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I have a Bryant furnace model #340AAV036080ABSA and it's the auto ignite pilot, but pilot won't light. Gas is on to it, blower is working just no hot air so I figure pilot not lighting

I have a Bryant furnace model #340AAV036080ABSA and it's the auto ignite pilot, but pilot won't light. Gas is on to it, blower is working just no hot air so I figure pilot not lighting has a lot to do with this. How do you light an auto pilot

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Is the thermocouple burnt out.? A bad one of these will not allow the pilot to function . The thermocouple is the outfit that the pilot heats up when it tries to start up. A lot of the time this is the problem when the furnaces won't light up.

Posted on Nov 15, 2014

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Posted on Jan 02, 2017

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SOURCE: Fix for coleman rv furnace

Check all limit switches and check power to gas control

Posted on Jan 06, 2009

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SOURCE: Rheem gas furnace blower unit not working properly

look at circuit board and follow wires that come from fan motor, if this is a standard motor black is high and it will be going to a prong that says cool, red is low and it will go to heat, you will have a yellow and a blue that are "parked" remove red park it were the blue is and put blue on heat, if this is a variable speed motor you will have to set dip switches via your equipment manual

Posted on Sep 30, 2009

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SOURCE: amana gas furnace,air command 80 sv. does not ignite blows cold

Hi check out the pressure switch jump it out and see if it lights also check the igntion coil is glowing

Posted on Feb 09, 2010

Therinnaiguy
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SOURCE: Amana Air Command 80 SSE gas furnace will not stay running

In the path of the flame on the last burner that starts, there will be a small rod. That rod is the flame sensor. Take a scrub pad and polish it. Also check the electrical connection that goes back to the circuit board. Disconnect any ground wire from the circuit board to furnace cabinet, sand it and replace it.

Posted on Mar 14, 2010

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SOURCE: Delonghi Superser won't light there is gas getting

Clean pilot first see if it lights if not you could change thermocouple

Posted on Apr 05, 2012

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1 Answer

Pilot light wont light


Rita, Check the attached links,instruction and guides to trouble shoot pilot light, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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check the blower motor for seized of burnt out. Fuses blow because of excess current draw and in this case if the fan is not starting everything will stop. The gas will be set so that if the fan is not running the gas will not be allowed to turn on

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If yours is a high-efficiency furnace, you should hear the stack blower start running when your thermostat calls for heat. Next, the igniter should start to glow and remain glowing until the thermocouple opens the gas valve and allows gas to flow to the main burner. The main burner lights and burns until sufficient heat is generated for the main blower to turn on and blow warm air through your house. If any action does not occur in the order described, repairs are in order.

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Furnace burners won't ignite


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GE furnace pilot won't ignite


Check for 24 volts at the pilot valve on the gas valve, if there is voltage, take an amp reading, if you get amperage it's trying to work, see if pilot orifice is obstructed by webs etc. very common to see this.

Oct 31, 2012 | Heating & Cooling

1 Answer

Just replaced idnitor and flame sensor on a bryant model 376c and its still not kicking on. blower kicks on fans kick on and then cycles off. no heat need help


Make sure all wires are connected and the gas is on. Follow the sequence of operation for this model and a few tips on what could be the issue.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Jan 27, 2010 | Heating & Cooling

1 Answer

My furnace will not shut off on auto. the fan will not run when switched to on. what should I check?


Some new furnaces have a feature that when it has an issue, it starts the room air blower until you reset the thermostat or kill power to the furnace. Not knowing what you have for a system I can offer you only how a furnace works and what you could look for "generically".

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Jan 18, 2010 | Honeywell Heating & Cooling

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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