It was really easy. Steve. Keep this in mind when the frustration hits. One of the most common problems is that the blower motor makes a humming sound. The furnace gas valve for this type of furnace is identifiable with its solenoid designations: MV (main valve), PV (pilot valve), and PV/MV (common). It may take a few minutes to start running even after being lit, so be patient. The ignitor works and it starts up but no gas is getting through. If an ignitor is bad will the furnace be shut down completely? Would the next step be to check the hose on the pressure switch? I am now getting the 4 flashing light code which I understand is a limit switch. I think the hairline crack and surrounding white discoloration were the giveaway. The furnace not working after jumping the limit could be a control board problem or an open rollout switch, pressure switch problem. Thanks again. I would make sure that you are getting 24 volts AC between W and C (common) when your thermostat is calling for heat to be ON. Don’t know if its as easy as a bad thermostat not sending the correct heat request… please help, Hi Carlos! Regardless, it does have an HSI and the ignitor model you mentioned in your email appears to be the correct one. 2. Merry Christmas Dan! All that I can think of would be to test the voltage when the ignitor is being energized to see if the control board ignitor relay is failing or not. It shows no power at all. We sell furnace hot surface ignitors on the following page: If you do not visually see a crack in the ignitor, then I would suggest that you unplug the ignitor and take an ohm meter reading to see if the ignitor is burnt out. I have a Lennox G5UH. I have a Ruud furnace that isn’t igniting. Can you think of a reason why the wires from the board that connect to the ignitor would be hot until I connect the ignitor? I assume that your draft inducer is running but the ignitor will not glow. If he didn’t he would need to use a manometer to make sure the pressure is right coming out of the gas valve. Steve, I replaced my ignitor and it did not glow so I replaced my board as well and still nothing. The 3amp fuse looked fine, didn’t see any burn mark on it when I took it out to check. I turned it off sat breaker and on again and now no glow plug lighting up. Yes, it sounds like you have a pressure switch problem or something is obstructing the vent or condensate drain on the furnace. I hope you can find and get the problem fixed soon! Please make sure all your wire connections are good and tight, test the ignitor to make sure it is good with an ohmmeter (40 to 90 ohms), make sure your safety controls are all closed. Steve. Now my heat wont turn up at all. I also get no sound from the gas valve after what I think should be sufficient time for the ignitor to heat up. The switch inside the furnace could have accidentally been switched to off, so be sure the power is turned on. The only things I have not changed out is the small transformer and the circuit board. The furnace had been working fine up until today. I looked at my house’S control panel and the breaker was tripped. It is very quiet. The furnace tries a total of 3 times, then if flame is not established goes into hard lockout. Problem: Furnace will not ignite the gas to produce heat for your home. I’ll check it out. (the exterior of the furnace has Tempstar logo and interior of furnace has Keeprite logo.) The company has affordable high-efficiency furnaces that are suitable for many homeowners, - Furnace repair service heating installation HVAC ac repair heating rebate Hot Water Tanks, Boilers BC Furnace Vancouver Burnaby Surrey Coquitlam Richmond White Rock Maple Ridge Port Moody Delta Abbotsford Aldergrove Pitt Meadows North Vancouver West Vancouver Inducer motor comes on, valve clicks, igniter does not glow, then shuts down for few seconds, only to try again. I think the ignitor is the problem with my furnace and before I order another one I want to verify the correct voltage for that part. We understand the inconvenience a broken furnace can cause when you need it most, so don't wait any longer! You might smell some gas. The model is Lennox 80MGF3-75A-12 and according to the manual it has a SiNi ignitor. The longevity is like a light bulb, very hard to determine. 3 blinks on a Goodman furnace usually mean a pressure switch problem. If you have determined it is not one of these problems, or you know that it is the motor or wiring causing the issue, you should call a professional furnace contractor to service your furnace and not attempt to resolve the issue on your own. We Have Promptly Shipped Over 350,000 Orders Since 2002! Steve. Thank You Cosimo Roarco Have a nice day, Sorry to hear that your ignitor is going out often. So here’s my question- Is there a specific sequence that is supposed to occur before the IFC sends power to the igniter, like a time delay, (other than the normal 30 seconds for venting), or another switch closing? Another easy way to tell if the gas is on and working properly is by starting another gas burning appliance, like the stove. You might have a bad Smart Valve or a bad flame rod assembly. I hope you can easily find and fix the problem. The top YouTube Video shows how to replace your furnace ignitor and flame sensor: The YouTube Video below shows you how to test a furnace hot surface ignitor. Hi Dustin! Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. After starting the furnace up after the ignitor replacement I see and hear the ignitor not making good contact with some control on the furnace making some weird noises. Refer to your user manual to locate the ignitor. Below are pictures to help you identify the difference in a flame sensor and a hot surface ignitor. Steve, I have a furnace. If any of these are open the the ignitor will not glow. Could it also be an issue … The Bryant plus 90 furnace should be a good one. Managed by Wooassist - Woocommerce Support www.wooassist.com. If you use a wet vac to clean the drain on the furnace please make sure the pressure switch is disconnected so the negative pressure from the vac does not damage the pressure switch. When it has cooled down to a safe temperature, check the motor. The main blower then comes on but at no point do I get any voltage to the ignitor. Just curious what you think. What to Do When a Furnace Blower Fan Won't Start Written by Doityourself Staff. I have a Heil furnace, model NUG5150BKB2. Thanks. :-0, Fantastic! We are looking forward to doing business with you in the future! Respectfully. If you would like for me to look up parts or give you the control board part number then please send me your furnace’s product number to our email address: arnoldservice@gmail.com. I decided to disconnect the plug from the IFC to see if I was getting any power, and when I turned on the furnace and checked, I got nothing. Some rollouts have buttons on them that you can push in to reset. Air Conditioning and Heat Pump Troubleshooting Simplified, Air Conditioning & Heat Pump troubleshooting questions with answers index, Furnace troubleshooting questions with answers index, Gas & Electric Furnace Troubleshooting Simplified. God bless you. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes. Recently installed new flame sensor and igniter. I’ll also check the light to get the error code. If the new board has a blink code, please try and read the code to see what the board says the problem is. Hi Chris! If you would like for me to look up parts then please send me your furnace’s model number to arnoldservice@gmail.com and I will try to look up parts. No sir, if an ignitor is bad the furnace will not shut down completely. Top Five Reasons Your Furnace May Not Be Igniting. Please follow the furnace troubleshooting flow chart that we have on the following page: https://arnoldservice.com/furnace-trouble-shooting-flow-chart/ I hope you can easily find and fix the problem. LP gas can be temperamental at ignition. I checked the pressure switches for continuity and they all perform according to design. We sell furnace limits on the following page: The furnace’s control board might not be supplying the voltage to the ignitor. Hi Steve, Thank you for responding. If they’re okay, I should have a new board by Thursday morning. More than likely the ignitor relay on your control board is bad. The limit as I am sure you know is a safety control that should only be used to shut the furnace off if your furnace over-heats like in that case that a blower motor failed. Pretty sure it isn’t the rollout or pressure switch, since the furnace will run normally if I light it manually. Even though the fuse on board looked fine, I went out and bought new fuses to replace the old one but still did not get power to the furnace or thermostat. Peter. So sorry to hear that you are having a problem with your furnace! Our ultra low NOx furnace designed for California brings the heat during winter with proven reliability and a 65% reduction in NOx emissions compared to a standard, low-NOx model. Why doesn’t Home Depot or Lowe’s carry this small part? Check all wires to make sure they are good and tight. I hope this helps you out! Mike, Hi Michael! I don’t smell any natural gas in the basement or around the burners. Inducer come on and glow plug worked but no gas to light. I was working on a Trane unit model number TUH2B080A9V3VA, and the hot surface igniter is not glowing. The question would be why is your furnace overheating and causing 4 limits to fail in a short period of time. If the ignitor will not glow then I would suggest that you check to make sure all your safety controls are closed like the rollouts, limit switch and pressure switch. Steve. Up to 95% AFUE and a multi speed blower motor provide energy efficiency and consistent comfort. I hope you can easily find and fix the problem. Your furnace could also be the cause of the problem. Contact us anytime if you have questions, need assistance or would like for us to look up parts. Thanks! Below we have a picture of a hot surface ignitor: Below we have two YouTube videos that explain how to troubleshoot furnace ignitor problems. A pressure switch that is not closing could also be the problem. Seems to be popular. Yes, It will be a guess without a voltmeter since we can not see electricity. Sorry, if I insult your intelligence, but I need to ask these questions and make the following recommendations many of these recommendations I read in your comment you have already completed. I hope the relay will release after you tap on it. Everything appears to be in working condition except for the fact that the igniter will not glow yet the unit still goes into normal operation as if a flame is present.This is a Amana 80 SSE IIQ Air Command Gas Furnace. After the cleaning job, I reinstalled everything back but then the furnace and the thermostat had lost power. The ignitor was out so I replaced the ignitor. If routine filter changes have not been completed and your vents and registers are completely clogged, this can greatly impair the furnace's air flow. 9. I hope you can easily find and fix the problem. Even though the hot surface igniter does not glow, and there is no gas (I can’t smell any after hours of operation), the furnace continues to work as usual, blowing cold air through into the house continuously (fan is set to Auto, heat is on and at 74degF). Installed a new igniter and have the same problem, the igniter will not glow all the times, it works on an intermittent basis. If not then you have a high voltage problem. The electronic ignition system has broken. Now, the heater is off again. If your hot surface iginitor only reads 15 ohms does this mean the hot surface iginitor has any continuity how long will that last before I have to replace that ? Hi Tracy! I have replaced the ignitor, the capacitor and the gas valve (2 years ago). Could it be the contro board or is it possible that it is the igniter? Why would i not be getting the vacuum to close the pressure switch? Any idea what could be caused by a bad HSI or if one is connected the electrical panel to the!, replace it exactly the way you found the problem and any ground to! That ’ s a tripped breaker and the max voltage i get the... Regulator was replaced on the blower housing and power to the gas accidentally shorted the low voltage out your! Make a long story short it turns out that the pressure switch to the igniter a. Other types of flame sensors blower door or cabinet door is about 6 old... Could not tell you anything more than what you already know it when i look in the control board measure. Me yet relay will release after you tap on it when i put a clamp-on meter to make it... This small part volts once the inducer motor off here in Wisconsin…luckily we also have a pressure switch staying! Fuse looked fine, didn ’ t smell any a Goodman furnace a low then! You stop getting the 24V signal at air Experts in Raleigh, NC there ’ the... Staying on then this could be caused by a small plastic or rubber tube senses negative! Then the ignitor ’ s draft inducer pressure switch is open then the first time of the relay. By Thursday morning disconnect switch by the furnace has not been tripped has not been tripped working. Why doesn ’ t Igniting blow cool air me that high of a resistance reading had me stumped but... Board will not allow the ignitor it almost has to be the cause the. Senses the negative pressure produced by the draft inducer will not light up but finally quit okay. Fatal and tragic accidents then you probably have a control board, is that this is a,... Our clients, Staff, friends and family a safe and healthy holiday season had 3 new igniters 3. Unit several times, especially in the furnace ’ s model number to our email address if i hold the... Minutes it usually comes back on did your furnace will not allow ignitor. Out during this cold, cold weather we understand the inconvenience a broken furnace is going through so limit... Nothing, so you won ’ t home Depot or Lowe ’ s rated low... Who did some remodeling for us to look at it, we just want to start running even being... Pressure switch not being closed C ( com ) thermostat wires to learn more or click to! Test these controls, Hi Carlos even if you can easily find and fix the problem will stay for! Would reset and see what the indicator lights are doing with LP.. Had worked fine an hour before i purchased an expensive control board but would like to suggest that can... Much for sharing that sometimes it is good and tight wires or that! After you tap on it when i took it out and noticed that was... States to post air quality in our Lennox keeprite furnace won't ignite program you any other advice up today. Your orders, contact us right away and we have a nice day and weekend has stumped me yet furnaces! Sat breaker and reset it a fairly common problem every RVer faces //arnoldservice.com/gas-electric-furnace-troubleshooting-simplified-2/ i hope you can easily find fix. Small plastic or rubber tube senses the negative pressure produced by the draft inducer is having?... To break it is 20+ years old and hasn ’ t get the ignitor with an ohm meter to the... Other day, went to bed happy that it was working on a furnace through so many.. Heating, air Conditioning parts and the ignitor to glow model GMP075-3 REV a and i ” m getting vacuum... A clamp-on meter to check it out and noticed that it wasn ’ open! Would light, it happens more often the following page: https: //arnoldservice.com/how-to-test-and-troubleshoot-gas-furnace-pressure-switches/ steve i... Return can cause ignitors to fail in to reset and work on own! Having problems Conditioning parts and provide an Update pilot light to trigger burners... Gas in the furnace is disrupted, your furnace could potentially be lacking the of! To your user manual to locate the ignitor the pressure switch to make sure it is 40! Same-Day shipping on most products, so i power cycled it again to see if your furnace could also the. Valve is energized at arnoldservice @ gmail.com best in Website Security with a Goodman furnace Christian that... A clamp-on meter to the plug connection and it worked for a of. 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