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Furnace igniter not igniting and I know the igniter is good.

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Is the gas valve on? Is the pepcock on? Is the gas meter on? azeddysac@yahoo.com

Posted on Nov 06, 2010

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What to do with my furnace... When I turn it on it won't ignite, does anyone know how to fix this?


If it runs then there several things that could be wrong with it. one there might be something blocking the air flow which won't let it ignite usually mud dabbers like to build nest in furnace vents and intakes look in the vent with a light and see if this is the cause.

Aug 29, 2014 | Keystone 2010 Cougar 324RLB

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Home Heating Repair - How to Change Your Gas Furnace Igniter


You have run all the tests and they all point to your igniter being bad in your gas furnace.
Your purge blower runs, the power comes on to the igniter, but you get no glow from that little wonder. How can it be changed?

Changing the igniter on your gas furnace really is not all that hard. But it may require a bit of patience and some tools that can get into some very tight quarters. Some furnace manufacturers have design their units to make this job very easy. Some other engineers obviously have never got away from their desk and picked up a screw driver. Hopefully you are lucky enough to have one of the easy ones.

The higher the efficiency of your furnace the harder this job will be. Usually the 90+ furnaces will have the burner compartment sealed. You will have to get the covers off of the burner compartment to get to the igniter. On the 80%er’s the igniter will usually be somewhere on the burner nearest the center of all the burners. Make sure that you remove all power to your furnace before you attempt to remove the igniter. It runs on 110V power and will give you a good jolt if you touch it with power going to it.

Once you have located the igniter, you will need to find the screw or screws that hold the igniter in place. Remove or in some cases just loosen the screw and remove the igniter. Take careful note of the location and position of the old igniter so that you can reinstall the new one in the exact position as the old one. In most cases the wiring will just be a Molex plug that you can just unplug the old igniter and then plug your new igniter back into it.

Carefully position the new igniter into the same location and tighten the screw(s) that hold it in place. Plug the new igniter into the plug and replace the covers on the burner compartment if there is one.

Now you can turn the power back on to your furnace and try for ignition. Hopefully you get the glow and ultimately fire in from the burners. This will give you heat and make everyone happy!

http://www.fixya.com/support/r4015846-furnace_ignitor_care_home_furnace

on Dec 06, 2009 | Heating & Cooling

1 Answer

Rheem Furnace


do you have a standing pilot or electronic ignition furnace........you could have a problem with a safety switch, bad electrical connections, electrical short, circuit board issue, hot surface igniter issue....etc...........need to know the type of furnace

Dec 05, 2013 | Heating & Cooling

2 Answers

Furnace repair


By not knowing much, I would think that maybe the gas is coming out, but not igniting. I would also need to know if it is working, and heating up your home. If the it is not igniting, than it would not be working. Something may just be caught in it., be sure to check the filter.

http://www.marylandoilco.com/Furnace-Repair-Dundalk-MD.html

Dec 03, 2013 | Heating & Cooling

1 Answer

Weather king select furnace


At the opposite side of the burners from the igniter there is a small metal probe/rod situated where the flame would blow across it during operation. This rod is for flame verification so the gas valve will know that the gas is being ignited. Often that probe will get carbon built up on it which will cause the furnace to light but then abruptly shut off because "the probe doesn't know there is a flame there". A fine grit sandpaper works well to restore it's conductive ability. However, if the furnace runs for a while before it shuts off you could very well have an obstruction in the vent pipe or an obstructed indoor coil. If cleaning the flamerod doesn't remedy the problem, I strongly recommend a qualified serviceperson look at it! The furnace could well be turning itself off because something is getting too hot and coming back on when it cools. Good luck.

Dec 01, 2013 | Ruud Rheem Weather King Furnace Igniter...

1 Answer

York furnace won't ignite


Is the igniter receiving 120 volts after the pressure switch closes? If not, either the board is bad or the pressure switch is open

Nov 27, 2012 | Heating & Cooling

1 Answer

Amana furnace. The furnace goes through the cycle but wont ignite. I have already checked the ignitor.


Try blowing out the jet Burners with compressed air especially the one nearest the Ignitor. Right through where the gas comes in. These can get dusty and cause ignition failures. Also check to see if the Ignitor is in the path of the burner and has not somehow gotten bent. 100 or so ohms on the Ignitor should be good.

Oct 10, 2012 | Amana GMVC80905CX Gas Furnace

2 Answers

I have a Carrier Weathermaker 8000 furnace. it will not light.I tested the igniter on my upstairs furnace and it will glow and light that furnace. I can manualy light the furnace with a match. flame sensor...


If you're sure the igniter is good and the controller is sending voltage to gas valve to open, but not to the igniter then, yes, the controller is bad. The only way to know for sure is to remove the igniter's molded plug from the board and test voltage directly at the board. You should get about 100-120 vac to the igniter.

Mar 25, 2010 | Carrier XHB123D X/Y Series Heat/Cool Air...

1 Answer

I have a Lenox furnace. Before this igniter kicks off, there is a loud noise comes from furnace. Where is that noise from? Thanks.


This is what we call a "delayed ignition",(gas is not being ignited right away), gas builds up in the chamber and then lights causing a boom. The cause of this problem could be from having dirty burners or ignitor not position to ignite the gas right away or your ignitor may not being glowing enough to ignite the gas being released, check all, Good luck.

Jan 08, 2010 | Goodman GMS90703BXA Heater

1 Answer

Blower on colman gas furnace will not come on. (have no gas yet)


I'm not a furnace technician. But I have worked on several Coleman trailer furnaces. So keep in mind that my terminology might not be exactly correct. But I think I can help you.

I don't know what model you are running, but most of them run pretty much the same. You have a four basic components to check. Thermostat; Ignition Control Module; Pressure Switch; and which ever of the following that you have (Glow plug, Electronic ignition, Pilot Light).

I'm assuming that you are referring to the blower as the "Rat wheel blower" (round wheel looking thing with fins on it). If my assumption is correct and if the power from the breaker box to the furnace junction box (Probably with a on and off switch on top or side), than when you give it power (from breaker box and turn thermostat up) the fan (not blower) comes on. If it doesn't there is a probably a problem with your Thermostat or Ignition Module. If it does come on and your glow plug or you igniter tries to work. Than yes, you are correct, you have to have gas pressure to let the pressure switch know that there is adequate gas supply pressure (gas- 5 to 7 W.C, propane 11 to 13 W.C). The reason for this is if the Pressure Switch doesn't feel the correct pressure. It thinks you have a leak and won't release gas for ignition. After you turn the gas on. If the furnace doesn't ignite. Make sure the Thermostat is definitely wired properly. Now we are down to one of three problems. If the Glow Plug, Electronic Ignition, or pilot light are working properly. Than we are down one of two problems. The Ignition Module or Pressure Switch. Check pressure on the Pressure Switch. If yuou don't smell gas it is probably OK. But it is best if you use a manometer. I have rarely found Pressure Switches bad. Normally if I get to that step. It is the Ignition Module. The Ignition Module kind of like the brain of the furnace. It is located behind one of your front panels. It will have approximately 10 wires going to it. Some will be going to the Thermostat, some to the Glow plug (Igniter), some to the Pressure Switch, and some going to the blower.

I have probably said more than you need to know. If I did I apologize. But to wrap it up. You were probably correct. You definitely need gas for the blower to kick on. The furnace has to light and heat up before the blower will Start. Not to keep rattling, but to check to see if the blower motor will run. Is to switch the Thermostat from "auto" to "run".

Good Luck

Nov 17, 2008 | Coleman Propane Forced Air Heater...

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