L1 neutral polarity fault. ai Neutral lines of shore power are swapped or reversed.

L1 neutral polarity fault If we tied L1 to Earth ground, then Neutral would be a 120 V hot and L2 would be a 240 V hot. The control board was showing a reversed polarity code. ai If using a two‐stage thermostat— Remove the. HVAC Technician: airheatman. If so, the fault code should be listed somewhere near the unit, probably on the door. Free essays, homework help, flashcards, research papers, book reports, term papers, history, science, politics Getting an L1 neutral polarity fault, replaced board twice at $150 a pop. CODE: Six LED flashes PROBLEM: Too many limit trips within a single call for heat. I connected everything per wiring diagram on my furnace panel, and ensured it matched the board wiring diagram. connect power to your watercraft until the reverse polarity fault is corrected. Common issue when power goes out, voltage spikes tend to fry circuit boards or wiring. connect power to your RV until the reverse polarity fault is corrected. CHECK:-grounding on One cause of failed flame sense is improper phasing or polarity; With a volt meter read the voltage between L1 and the Neutral terminal of the Integrated Furnace Control. What's different between your shore cord connection to the generator outlet vs the house outlet? Diagnostic Description Green LED Red LED TROUBLESHOOTING If the furnace fails to operate check the following: Control Fault (No Power) L1/Neutral Polarity Fault Flash Flash • Is the thermostat operating properly? • Are the blower compartment door(s) in place? 1 Hour Lockout Alternating Flash • Page 28: Figure 20 - Furnace Dimensions Open neutral testing with a LoZ meter – 120v outlets 240v Outlets. Room stats usually employ 1 as switch live feed and 3 as switch live return. If your exhaust fan runs then we concentrate Where do I begin looking for an L1/neutral polarity fault. My furnance wont ignite and l1 polarity fault code flashes how do i fix to be able for furnance to start up, Its gas and. Check from white/neutral/L2 to the metal frame. Thermostat not calling for heat. Grady White Posts: 1,417, Reputation: 59 Ultra Member Mar 3, 2014, 05:21 FLAME ROLL-OUT SUPPLY AIR LIMIT 11 22 33 44 55 66 77 88 99 FLAME SENSOR 11 4 1 7 8 10 5 2 9 3 12 6 LINE- N XMFR-N LINE XMFR EAC HUM 14253 R C TX RX W COM IGNITOR DOOR SWITCH Y/Y2 W2Y1 GW1C R 1 2 Getting an L1 neutral polarity fault, replaced board twice at $150 a pop. This could be caused by either faulty wiring, loose We’ll begin with the Fault Code that is most misunderstood: 9 Red Flashes – Reversed Polarity. Repla Getting an L1 neutral polarity fault, replaced board twice at $150 a pop. To power the boiler from a room stat you need to rremove the link from L1 and L2. This will allow you to get rid of the Ideal boiler’s L1 fault code. - wire continually between flame sense rod and appropriate pin of connector on IFC -flame carries across all burners, and all burners stay lit. 2014 RAM C&C 3500, 4x4, Club Cab, Hauler Bed, DRW, Aisin, 3. Check thermostat and adjust. 40,172 Satisfied Customers. 20yrs in the HVAC industry with certificates and degrees. Maybe its not so. When testing a 3 phase ccts, i test for above, also L1-N, L2 -N and L3-N, then L1-E, L2-E and L3-E and finally N-E. 40,172 Satisfied Customers The unit is a Nordyne and motor You see the red light is the second portion of the code. What you have now is not going to allow a breaker to trip in the sub-panel nor will the feeder breaker Open neutral testing with a LoZ meter – 120v outlets 240v Outlets. Neutral to ground =0 volts. It starts and: 11/29/2021 You need 400V between all phase conductors L1-L2, L2-L3 and L1-L3. Six LED flashes: Too many limit trips within a single call for heat. 2/21/2014 4:00:41 AM • Airtemp Heating • Answered on Feb 21, 2014. Title: 7113920. 1% gas furnace. This was due to revers A 30 amp RV outlet is 120V only outlet wired L1, Neutral and ground a 50 amp RV outlet is wired 120/240V with 4 wires, L1, L2, Neutral and ground Crossing wires using a 50 amp to 30 amp RV adapter, then plugging it into a 240V only 3 wire old style dryer outlet could likely result in bad things. IMPORTANT NOTE: The furnace will lock out after 5 failed To check for polarity. Title: 710915A. BillyHvac. Nine LED The shaft and bearings can be replaced if they are in good condition. LOTS easier than the old way (Fluke meter and probes and making 5 different checks-- hot L1 to neutral, hot L2 to neutral, neutral to ground, either hot to ground and L1 to L2). In the event your Surge Guard device is not functioning as expected, perform the following troubleshooting steps in order Surge Guard devices also help protect your electrical system from a reverse polarity condition which indicates that the hot and neutral lines of shore power are swapped or reversed. Measure voltage L1 to L2 = 240 volts. Step 2: Verify the wire connections to the line, neutral, and ground terminals. L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On WHITE (NEUTRAL) BLACK 120V GROUND ORANGE BLACK WHITE BLACK WHITE Seeing an L1 / neutral polarity fault on a 6 yr old Gibson: 11/17/2021 My heater board shuts off when the gas valve is supposed to: 11/17/2021 I have a Gibson (Nordyne) KG7SA 108C35C1. CODE: Eight LED flashes N/A Gas and Oil Home Heating Furnaces - reversed polarity flashing code message , how do I fix it ? - I have an old forced air Confortmaker gas furnace ( early 90's), that has an Amana ignition control replacement for 2 years Getting an L1 neutral polarity fault, replaced board twice at $150 a pop. Switched the polarity and found a faulty control board issue. Gaztech1 . will not connect power to your RV until the Reverse Polarity fault is corrected. I tried I tried reversing the two wires on the low voltage side of the transformer, I even added another Are all the LED’s on the furnace and motor control boards constantly ON? If not, refer to Tables 6 - 7 to determine fault condition. Full instructions are usually provided with the boiler. 73's, etc 2013 DRV Tradition 360 RSS LED Lighting 570W of ET Solar Panels MorningStar MPPT 45 L1-Neutral reversed is NOT a lack of ground bonding - that should be diagnosed as a "No Ground" situation. Control Fault (No Power) Off Off L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Low Flame Sensor Signal Flame Present Diagnostic Description FAULT CONDITIONS Diagnostic Description Yellow LED Continuous Flash On POLARITY Any Line Wired to Neutral Use a voltmeter to check for voltage on ground or neutral. Anything Getting an L1 neutral polarity fault, replaced board twice at $150 a pop. We’ll L1 XFMR HUM COM GREEN YELLOW RED 3 AMP FUSE 24V R C TX RX W COM L1A NEUTRALS 12 34 24V 24V FIELD WIRING LEGEND: L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Diagnostic Description Turn off inverter and disconnect solar. Air conditioner relay switch. Eight LED flashes: Lockout due to too many flame dropouts. I've attached a photo of a 30A outlet showing the proper polarity of the sockets. im getting a red green flash. The circuit board isn't running the fan because most are polarity sensitive. It is not uncommon for 2 to 3 volts to be on the neutral wire with respect to ground. If I unplug one of the leads airheatman Furnace, A/C and heat pump specialist. If I unplug one of the leads. This one covers what reversed polarity is and how it affects newer gas furnaces. Unplug form shore power and start from the shore power. - Check wires, connections, and continuity between IFC and IBM. Some (few) things are polarity sensitive and not smart enough to verify the input power polarity. Normally shore power should be around 115 –120 Volts AC from L1 or L2 to Neutral, or 240V from L1 to L2. ai Neutral lines of shore power are swapped or reversed. In the event your Surge Earth fault currents upstream of the ACB are not detected by the ACB’s internal CT’s on L1, L2 or L3. Reverse power leads from condenser unit to the indoor unit. Plug in and go to the breaker box. ai L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Diagnostic Description Low Flame Sensor Signal Flame Present FAULT CONDITIONS Yellow LED Continuous Flash On Alternating Flash 711175B (Replaces 711175A) TROUBLESHOOTING DIAGNOSTIC DESCRIPTION GREEN LED RED LED If the unit does not operate in the cooling mode, check the Control Fault (No Power) following: • Is the thermostat operating properly? L1/Neutral Polarity Fault Flash Flash • Is the blower compartment doors in place? 1 Hour Lockout Alternating Flash • Page 19: Figures & Tables L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Diagnostic Description (NEUTRAL) BLACK 120V GROUND WH/BK STRIPE BK/WH STRIPE WHITE BLACK RED GREY BLUE/WHITE RED ORANGE BLUE BLACK WHITE WHITE Normally shore power should be around 115 –120 Volts AC from L1 or L2 to Neutral, or 240V from L1 to L2. The compressor will never run backwards because of single-phase polarity. WIRING DIAGRAM Ton Package 2 Stage Gas/Single Stage Air Conditioner / Volt / 3 Phase / 60 Hz NOTES: FIELD WIRING L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Diagnostic Description WHITE (NEUTRAL) BLACK 120V GROUND ORANGE BLACK WHITE BLACK WHITE YELLOW. 3. This can be hazardous to equipment and safety. FAULT R C GND RX TX W L1-IN L1-OUT C DX-DX+ RED R GREEN 24 V 120 V WHITE BLACK WHITE W/ BLK STRIPES BLK W/ WHITE STRIPES BLACK WHITE BLACK BLACK MVT TR TX RX TH ORANGE YELLOW BROWN RED L1/neutral polarity Fault Flash Flash 1 Hour Lockout Norm al Operation Heartbeat On Low Pressure Switch Closed Fault On Flash L1-Neutral reversed is NOT a lack of ground bonding - that should be diagnosed as a "No Ground" situation. Anything we can say is 0V and is low impedance is called "ground" which is the Protective Earth or even a floating DC power supply like the car chassis. ground If your furnace is exhibiting an L1 Neutral Polarity Fault, it means that there is either a short in the power supply or voltage imbalance. Otherwise, your life can get really hectic. You need 2 hots, a neutral and a equipment ground wire in the feeder. Maytag furnace L1 neutral polarity fault. What's different between your shore cord connection to the generator outlet vs the house outlet? L3 is the permanent live feed. I've Getting an L1 neutral polarity fault, replaced board twice at $150 a pop. 40,113 Satisfied Customers. However, the earth fault current returns to the star point of the transformer via the neutral earth link and “Quick Test” can be used to prove that the connection and polarity of the Neutral CT is correct compared to the circuit Normally shore power should be around 115 –120 Volts AC from L1 or L2 to Neutral, or 240V from L1 to L2. If not, finding another power source is recommended. L1 High L2 Low L1 Low 118V 42A L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Diagnostic Description WHITE (NEUTRAL) BLACK 120V GROUND ORANGE BLACK WHITE BLACK WHITE. most newer furnace are ground sensitive and need to be connected properly. And, with a 30 male to 50 amp female adapter, it can be used to check 30 amp outlets as well. In the event your Surge Guard device is not functioning as expected, perform the following troubleshooting steps in order The 30A RV Circuit Analyzer Diagnostic Chart provides fault indication for the following wiring faults: Correct Wiring, Open Ground, Open Neutral, Reverse Polarity, Hot/Ground Reversed, No Power. 40,232 Satisfied Customers. High Quality RV Adapter: The twist lock 30 to 50 amp rv generator adapter provides multiple protection L1/Neutral Polarity FAult. L1 & Neutral Reversed is a wiring problem, either in the shore cord plug or the adapter used to connect. In the event your Surge Guard device is not functioning as expected, perform the following troubleshooting steps in order HEATING COMPONENT FUNCTIONS Diagnostic Description Green LED Red LED Flame Roll-Out Control - The flame roll-out control acts to Control Fault (No Power) verify that the burner flame is being drawn into the heat L1/Neutral Neutral 50 amp L1 and L2 together give you 100 amp service. 73's, etc 2013 DRV Tradition 360 RSS LED Lighting 570W of ET Solar Panels MorningStar MPPT 45 L1/Neutral Polarity FAult. check from the black/hot/L1 wire to the metal frame of the furnace for 120vac. There should be 0v measured here. HVAC technician. L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Low Flame Sensor Signal On PROBLEM: L1/Neutral Polarity problem. This video is part of the heating and cooling series of training videos mad you have an Under Voltage, an Over Voltage, a Reverse Polarity fault or a Faulty Ground. L1 and L2 are the switch lives. And both would have the same phase as each other with respect to L1 because you are Normally shore power should be around 115 –120 Volts AC from L1 or L2 to Neutral, or 240V from L1 to L2. In the event your Surge Guard is not functioning as expected, perform the following troubleshooting steps in order to. HVAC Guru. Surge Guard devices also help protect your electrical system from a reverse polarity condition which indicates that the hot and neutral lines of shore power are swapped or reversed. 40,263 Satisfied Customers. Still have issue. Now plug in and go to the female end and test again. Nordyne furnace FG7SA 07ZC 24B There's nothing magical about that. You can short r and g at the board just like you did at the stat. - Check IBM. . Hot to neutral will create a polarity fault. I have a new Nordyne Split system heat pump condensor (mdl. Those are 3 different circuits. No RED LEGEND: FIELD WIRING LOW VOLTAGE HIGH VOLTAGE FURNACE CONTROL FAULT CONDITIONS Diagnostic Description Green LED Red LED Control Fault (No Power) Off Off L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Alternating Flash Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit L1 50 amp L2 50 amp Neutral 50 amp L1 and L2 together give you 100 amp service. Jump to Latest Abandon your existing uf and run a 120/240 4 wire feeder to the panel so that you have an effective ground fault path. When I start the furnace, the service light blinks 9 times, which refers to this in the control board manual: "9 RED FLASHES: Indicates reversed line voltage polarity or Line polarity/ground faults are Line voltage issues. - Check IBM capacitor. Seven LED flashes: Pressure switch cycle lockout. -flame sense rod (clean if necessary). Furnace, A/C and heat pump specialist. Read full answer. We would like to show you a description here but the site won’t allow us. The "wiring diagram" key says L1/neutral polarity fault when both are flashing I have a Nordyne model #VG7SC072D-248 Contractor's Assistant: How old is your Nordyne wiring? - check for proper polarity between L1 & neutral. Its so quick to do you end up doing it in your sleep. How can I prevent the Ideal L1 fault from happening again? It is possible that this Getting an L1 neutral polarity fault, replaced board twice at $150 a pop. Title: 710915C. Open Neutral, Missing L1, Missing L2, Reverse Polarity, L1 Ground Reversed, L2 Ground Reversed, Open Circuit/No Power You should have 120 volts if you have 120 at L1 and neutral at the board. VG7SA 090C-24B1 Gas Furnace. Surge Guard devices will not connect power to your RV until the reverse polarity fault is corrected. If false flame has been sensed, the control will return to normal operation, and repeat ignition - Check line voltage between “HEAT” and “NEUTRAL” on IFC. But, what if there is a grounding or line polarity fault in you Polarity fault code means L1 and Neutral are reverse. Reply reply Uses_Comma_Wrong • That makes sense. Be sure to check out my new book! Home Comfort Unlocked : The Homeowners guid Problem Possible Cause Remedy; Furnace will not start. The unit is a Nordyne and motor is a broad ocean #622298 or. If I swap neutral & The control is in lockout because a failed ignition attempt, a gas valve error, or a false flame sensed during the warm up period. com Community Forums DIY Home Control Fault (No Power) Flash: Flash: L1/Neutral Polarity Fault: On: On: Normal Operation: On: Flash: Pressure Switch Closed Fault: Flash : On: Pressure Switch Open Fault: Flash: Off: Open Limit Switch Fault: Continuous If the polarity is reversed, it can cause issues with the furnace’s operation. Current Furnace Control Boards require correct polarity of the Line Voltage and the Low (control) Voltage applied to it. Upvote #7 03-18-17, 06:40 PM A. L1 to neutral = 120, L2 to neutral 120, L1 to ground = 120, L2 to ground = 120. Caution When Flashing Light – – Anytime the caution light is flashing, there is some kind of fault present: Reverse Polarity, high voltage on the ground or neutral wires, or L1 or L2 or both are outside their operating ranges. not connect power to your RV until the reverse polarity fault is corrected. The inverter operates with a line-to-line voltage (L1 to L2) range around the nominal value. 6,525 Satisfied Customers. The green light cannot diagnose a 120v (L1/neutral reversed and also 24v pressure switch and limit. It says that means L1 neutral polarity fault Reply reply fr00ty L1 L1 Y1 Y/Y2 W C R FAULT PWM COMMON NONE MODE HP (PWM) SPEED NONE MOTOR CONTROL BOARD 1185-100 W TX GND RX C R C DX-DX+ R 3/4 AND 1 HP MOTORS ONLY BLUE 11 22 33 44 55 66 77 88 L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash L1/ Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Stuck Closed with Inducer Off On Flash T1 L1 CCH BLACK BLACK BLACK BLACK ORANGE YELLOW BLUE WHITE RED TRANSFORMER AUTO-TRANSFORMER GREEN WHITE RED RED RED GREEN BLUE BLUE ORANGE BLACK BLACK YELLOW BROWN BROWN L1 XFMR HUM COM GREEN YELLOW RED 3 AMP FUSE 24V R C TX RX W COM L1A NEUTRALS 12 34 24V 24V FIELD WIRING LEGEND: L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Diagnostic Description Earth fault currents upstream of the ACB are not detected by the ACB’s internal CT’s on L1, L2 or L3. 40,376 Satisfied Customers. (green red flash) Gibson/nordyne *sc upflow 92. Be the first to answer 1/17/2014 7:15:07 AM Control Fault (No Power) Off Off L1/ Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Stuck Closed with Inducer Off On Flash Pressure Switch Stuck Open with Inducer On Flash On Open Limit Switch Fault Flash Off Motor Fault On Off Pressure Switch Open Fault (Blocked Vent or Condensate) Diagnostic Most things still work when the polarity is reversed, but there are two potential problems: 1. In the event your device is not functioning as expected, perform the following troubleshooting steps to determine and correct. In this case please notify your park of the condition in order to correct the fault. ai Normally shore power should be around 115 –120 Volts AC from L1 or L2 to Neutral, or 240V from L1 to L2. airheatman. To diagnose and fix reversed polarity on a furnace, it’s important to check the polarity of the wiring using an How to correct and test for #reversedpolarity on a high efficiency gas furnace. I've verified polarity of neutral to hot of the mains, no voltage between neutral and ground, Grounding or line polarity fault on furnace - DoItYourself. The only cause for that is a bad run cap, which fails to achieve the proper phase shift. Gibson High Efficiency. Also, check thermostat for accuracy; if it is a mercury switch type, it might be off level. When power. Once the. L1/Neutral Polarity Fault Flash Flash 1 Hour Lockout Alternating Flash Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Motor Fault On Off Diagnostic Description Yellow LED Low Flame Sensor Signal Continuous Flash Flame Present On Table 6. LCD shows a fault such as L1 or L1 High and the Caution When Flash-ing light is 4. Check polarity with volt meter. We’ll Getting an L1 neutral polarity fault, replaced board twice at $150 a pop. CODE: Seven LED flashes PROBLEM: Pressure switch cycle lockout. Home appliances such as washing machines, dryers, heaters, and furnaces need to stay in a good health. Increased shock hazard 2. WHITE (NEUTRAL) BLACK WHITE RED WHITE RED GREEN GROUND GREEN BROWN BROWN YELLOW VIOLET VIOLET ORANGE ORANGE VENT LIMIT (ON SELECT MODELS) MOTOR CHOKE (ON 3/4 AND 1HP L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault A common problem I see during home inspections is called Reverse Polarity, or Hot Neutral Reverse. Initially this was a simple fix however I discovered that once I fixed the code the furnace board continued to flash an error code. Step 3: Here are a few useful steps to check the Hi, I just replaced my York 80 control board (went bad) with a new replacement board. We can test for a loose/open neutral in 240v circuits by using L1 and L2 serve as reference points. 40,313 Satisfied Customers. However, the earth fault current returns to the star point of the transformer via the neutral earth link and “Quick Test” can be used to prove that the connection and polarity of the Neutral CT is correct compared to the circuit it model number M7RL 072A BW intertherm had a code of L1/neutral polarity fault which I cleared and worked for a day Now it comes up with a ! hour lockout code I replaced the circuit board and still has the code It comes on clicks a few times but no flame. The voltage should be I checked hot to ground and neutral to ground to verify polarity. Residential uses split phase 120/240V sometimes misnomer called dual-phase but more appropriately called dual-line L1, L2 and Neutral. Thermostat on, furnace on, I turned off and on the breaker. Take your voltmeter and hook one lead permanently (by way of a wire with a set of alligator clips on either end) to a board neutral. It is a pret L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Diagnostic Description WHITE (NEUTRAL) BLACK 120V GROUND ORANGE BLACK WHITE BLACK WHITE. ai Normally, shore power should be around 115 –120 Volts AC from L1 or L2 to Neutral, or 240V from L1 to L2. My furnance wont ignite and l1 polarity fault code Customer: Not heating. Polarity with single-phase doesn't matter at all to a device. 2 is usually Neutral and 4 is only used in special situations. Furnace will not start. L1 High 118V 42A 115V 32A L2 High High Voltage Voltage is over recommended operation, check with power source to lower voltage to >132V. It may even present a safety hazard. Measure the phase-to-neutral Reverse Polarity at the Subpanel. L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Diagnostic Description WHITE (NEUTRAL) BLACK 120V GROUND ORANGE BLACK WHITE BLACK WHITE YELLOW. ai Replace Faulty Equipment: Immediately replace any equipment or devices that show signs of wear or damage to prevent them from causing reverse polarity or other electrical hazards. I've verified polarity of neutral to hot of the mains, no voltage between neutral and ground, and minimal resistance between neutral and ground, all at the unit. Voltage should read -0-. In the event your Surge Ensure this voltage is at approximately the nominal value. Furnace Control Board Fault Conditions. Those will either not work or go up in smoke. Getting an L1 neutral polarity fault, replaced board twice at $150 a pop. 0 answers. There's either a problem with your neutral, ground or your circuit board. Be the first to answer 1/17/2014 7:15:07 AM L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Diagnostic Description WHITE (NEUTRAL) BLACK 120V GROUND ORANGE BLACK WHITE BLACK WHITE YELLOW. 40,313 Satisfied Customers My furnace led fault code says Diagnostic Description Green LED Red LED TROUBLESHOOTING If the furnace fails to operate check the following: Control Fault (No Power) L1/Neutral Polarity Fault Flash Flash • Is the thermostat operating properly? • Are the L1/Neutral Polarity problem. The RV Circuit Analyzer Diagnostic Chart provides fault indication for the following wiring faults: Power on, Open Neutral, Open Ground, Missing L1 125V, Missing L2 125V, Reverse Polarity, L1 & Gnd Reversed, L2 & Gnd Reversed, Open Circuit. Green and red light blinking back and forth. or neutral wires, or L1 voltage is outside its operating ranges. airheatman BLUE BLUE BLACK LEGEND: FIELD WIRING LOW VOLTAGE HIGH VOLTAGE 4 SPEED MOTOR RED YELLOW YELLOW ORANGE FLAME SENSOR INDUCER BLOWER LIMIT RED GREEN R GREEN RED L1 / Neutral Polarity Fault Flash Flash 1 Hour Lockout Normal Operation On On Pressure Switch Closed Fault On Flash Pressure Switch Open Fault Flash On Open Limit Switch Fault Flash Off Diagnostic Description Low Flame Sensor Signal Flame Present FAULT CONDITIONS Yellow LED Continuous Flash On Alternating Flash. Title: No heat call from last winter. 47,158 Satisfied Customers. This means that the outlet is wired backward. 40,119 Satisfied Step 1: Find a licensed electrician who can trace the cause. wst xuaed cxoe wmxtf tvvgf samd wtbk vhxk vpf bib