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Furnace pilot light turns on furnace lights then shuts off

The pilot light works just fine and the furnace starts up but then shuts off immediately.  It keeps trying to start but the same thing keeps happening.  Then out of the blue the furnace will work just fine!?!?!

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If you have a hot surface igniter (glow coil) it has a secondary purpose after ignition and that is to sense that there is actually flame present. If the HSI is located on one end of the burners look to the other and see if there is a small rod that protrudes in to the flame as well. If so it is part of this flame proving cycle. Take some sand cloth and clean it. This may buy some time but the rod should soon bee replaced.

Posted on Jan 17, 2009

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Posted on Jan 02, 2017

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What do I need to do to lite my heater after a summer rest?


How to Light a Furnace Pilot Light Here, we'll explain the basic steps for re-lighting the pilot light of a gas furnace.

#1: Locate the Instructions Label on Your Furnace

Every furnace should have a label on it that tells you how to light a furnace. Sometimes, however, the printing may be small or the furnace area may be dark. In these cases, the label may be difficult to read. Keeping the following instructions near your furnace or in another safe spot where they can be located easily will make the task much easier.

#2: Find Pilot Light and Components

Near the bottom of your furnace is a switch that normally says "Pilot," "On" and "Off." Find this switch and turn it to the "Off" position. Wait at least five minutes. This is important because it gives the gas time to dissipate, which is necessary to avoid possibly starting a fire. While you are waiting, take note of the location of the reset button, which should be near the dial you just turned to "Off."

#3: Re-Light the Pilot Light

Once the gas has had time to dissipate, turn the knob to "Pilot." Then, hold down the "Reset" button and bring the flame of a long lighter close to the pilot light opening. This should light the furnace pilot light. Once you are sure the pilot light is on, release your pressure on the reset button.
Sometimes, seeing a job bein

Oct 28, 2017 | Heating & Cooling

1 Answer

If the pilot go out on a furnace would gas continue to flow to the pilot , or would it shut off with in a few seconds


The pilot flame heats a thermocouple, so if the pilot goes out, the thermocouple cools and shuts off the gas. It can take anywhere from 20 seconds to 2 minutes for it to shut off. You should hear an audible click when it happens.

Sep 14, 2014 | Heating & Cooling

1 Answer

Where is the furnace breaker


Is the pilot light lit? There should be a valve that turns the gas off at the furnace itself. This valve is for the pilot lite There is no breaker of sorts but rather a sparker that lights the furnace. If the furnace does not light there is a small 12 volt valve that shuts off the gas to the furnace but not to the pilot light. Also make sure your 12 volt system is connected and operating. It wont work without it as it operates off that system not 120V. The same goes for refrigerators, the will not function with the 12v system disconnected

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I have a carrier 58RAV050-12 and my furnace won't turn on. It was working earlier today but it just stopped. Any suggestions as to why?


Check the pilot lt. If its out shutdown your furnace and call a repairman. If the pilot light is on, the flame sensor might have gone out. It's a long silver sensor that sits in the pilot light flame and senses when the flame is present. If it isn't working the furnace will automatically shut down.

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1 Answer

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if you are by passing stat at the gas valve and it is still not working,i would assume a bad control valve.

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it sounds like the afc the fan control not working could be dust on the afc

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check ur venting first make sure its not plugged

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Have the thermocouple replaced, ensure the pilot flame is blue - not yellow, yellow indicates blockage in pilot

Oct 08, 2009 | Heating & Cooling

1 Answer

Rheem gas furnace pilot lights, but no burners or fan


If the burners do not fully ignite, the sensor will shut the furnace down. The lack of sufficient burner flame is a gas valve or gas pressure problem within the valve.
Replacing the gas valve with the original one may get you going. I surely suggest a professional service company for safety reasons and a thorough inspection. A 20 year old furnace is past it's normal life span.

Jan 06, 2009 | Heating & Cooling

1 Answer

Pilot lights fine, furnace fires up, when it turns off the pilot goes out


need to have at least 3 feet of vent out of the roof, if it is to low the coll air will cold soak down to the pilot and shut it down.

Nov 08, 2008 | Cozy (W352E) Heater

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