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Fan won't turn off ,.after gas is turned off.even when cold have to turn off at power point

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This would indicate a bad fan relay switch. I can not really give advice on changing it out untill I know what type of unit and the model. Once you have these please comment me back and I will be more than happy to help you out.

Hope this helps Ya

Posted on Jul 13, 2008

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Home furnace comfortmaker blowing cold air


Home owner's manual? Troubleshooting section. Gas or electric?
If gas, pilot light may be out, or other gas controls. Are you sure you have gas supply? Do you have other Gas appliances so you can check? Furnace needs power for controls, fan and thermostat. Are you sure you have electric power to the furnace? Does the thermostat have a fan switch? If so turn it on and see if the fan turns on. If it does not turn on you may have a circut breaker poped. or some other reason power to the furnace is not working.

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1991 Ford F-350 runs rough at cold start, dies if gas peddle depressed?


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Cold weather may be making the lubricant too thick and impeding the motor from turning. On a cold day see how easy it is to spin the fan.

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The hot tub Hester will not light up pilot but does turn on and bow cold air


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Many things could be wrong. First off, the exhaust fan turns always goes on when you turn on(up) the thermostat. It does that to suck out any residual gas in the combustion chamber. After about 10 seconds you should hear a click which is the gas valve opening to let the gas into the chamber. You should also hear a series of clicks for about 10 sec, which is the electronic ignition firing. If you hear the clicking of the ignition, but do not smell gas from the exhaust, then the gas feed is being blocked. If you don\'t hear the ignition clicking then the computer board is detecting a fault condition by one of its sensors: over-temp, water flow, exhaust fan . These are all in series and if one doesn\'t pass then the ignition won\'t fire.

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For some reason the heater does not generate heat. the fan works but no heat. Any Ideas?


I've got an easy way for you to check, and then we can help you from there.
First pop open both lids to your furnace (this may require a screwdriver). Turn up your thermostat, push the safety interlock button in if it has one (it's a button that turns off the power when the doors are removed), and watch.

On most modern furnaces (past 20-25 years) you'll hear/see:
1. Inducer fan
2. orange glow (ignitor)
3. Gas valve opening and ignition (flames)
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that's normal heater operation.
The most common issue here is a burned out ignitor, in which case you wouldn't see the orange glow but the sequence would attempt to continue anyway (the gas valve will open and hiss gas, but it won't lite, then it'll give up and try again a few minutes later).

On older furnaces there's a pilot light to start with, the click of the gas valve and boom... ignition.

On new furnaces it's
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gas valve opening
spark - ignition
Main fan.

and there are some oddballs in between, particularly the Lennox Pulse. If that's your furnace just back away slowly and call a professional... some guys won't even touch those, so be sure to mention what it is... if you call a pro.

So go ahead and watch it run, then tell me/us what you see.

May 06, 2011 | Bionaire Heating & Cooling

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Hi newish oven,seems when all the ovens are off the fan is blowing cold air, any ideas?


cold air from the fan forced element area in the oven? or from the air vent just above the door? if its from the air vent then this is normal if your oven senses the outside cabinet is getting to hot it will bring on the fan and if its still to hot after u turn it off the fan will continue as its circuit doesnt run through the control knobbs meaning it wont turn off with the oven its controlled via a overload thermostat so the fan will remain on til it gets within its acceptable temp range and the thermostat will cut power to the fan, if it remains on for hours and hours or even days you will be looking at a new thermostat (cheap as dirt like only a few bucks) or worst case a controller

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Turns off automaticly


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    Ducted heating unit blows cold air and fan is always on..


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