My furnace appears to respond to my thermostat, when I shut it off and turn it back on, the motor kicks on, the pilot light turns on and the fan starts blowing, but the burners just don't seem to ignite to heat the air being pushed through...we've tried blowing out the burners to remove any dust that may have clogged them, that doesn't seem to help. However, just shutting off the power to the furnace for 10 minutes and then turning it back on seems to help, temporarily. Any ideas what the problem may be and how to fix before I call a repair man?
2006-11-30 01:49:31 · 10 answers · asked by vixen0babs 2 in Home & Garden ➔ Maintenance & Repairs
some how what you are saying does not make sense to me.The part about turning the furnace off for ten minutes then the burners work for a spell? Typically the temp. drops in the room with the thermostat and the thermostat responds and sends a signal to the gas valve to open. The gas valve will open IF the pilot light is on. The main burner is now lite and will burn until the temperature in the furnace plenum reaches a set temp. once this temp is reached the fan then starts and pushes air to the rooms and satisfies the thermostat setting. Once the setting is reached the gas valve closes and the fan continues to run until the plenum cools down to the correct set point then the fan stops and only the pilot remains on. Are you certain the main burner is not coming on even for a short spell? If your "air filter " was plugged then the fan could not remove the heat from the plenum and the high temp limit switch would shut off the main gas valve until the plenum cooled and then it would open again. The high temp. plenum limit switch may hae failed not allowing the gas valve to open, I just don't see how it can run after being off for 10 minutes or so. Have someone watch the burner as you raise the the thermostat setting and see what takes place. Good hunting!
2006-11-30 02:05:40 · answer #1 · answered by Steiner 6 · 0⤊ 0⤋
This problem is indicating that the computer/electronics that control the burner gas valve is not functioning properly. The fact that you power off and back on to make it work leads me to believe that is component is the problem. If you have some experience with electronic circuit board replacement, you can most likely find and purchase the circuit board online and install it yourself.
However, this is a bit risky if you don't have the experience necessary to test, troubleshoot and resolve these types of electo-mechanical issues. I would suggest you call a trusted AC/Heat service company.
If you feel that are two high, get another company to come out and give a second opinion. You can expect to pay about $75 for the diagnostic call-out, $75 for repair trip and anywhere from $100 to $500 for the circuit board if it needs replacing.
Good luck and I hope this helps.
2006-11-30 01:56:45 · answer #2 · answered by wrkey 5 · 1⤊ 0⤋
Somethings not right here.
The fan isn't suppose to come on until the air in the Plenum gets hot.
The chamber where the flame is, is NOT the air that goes into your home.
That's the Fire box. It heats a chamber and that air in that chamber (Plenum) is what heats your house.
It sounds like you have electronic ignition. If so, there's a thermo-couple that suppose to heat up to a point where it glows red hot. The thermo-coupler is what ignites the gas. The thermo coupler is an electical switch that opens the gas valve in your furnance, If it doesn't glow,than the switch doesn't come on & the gas can't get to your burners.
The thermo-coupler looks like a tube connected to the gas valve. If the glowing end of the thermo-coupler get dirty , the tip (glowing part) burns out. The glowing part is right where the gas comes out of the nozzle. If it doesn't glow when you turn on the furnance ,,it's shot.
Take it off and take it to a furnace repair shop so you get the right replacement. Make sure you know the kind & model # of your furnance.
2006-11-30 03:09:14 · answer #3 · answered by roseofsharons2002 2 · 0⤊ 0⤋
My furnace has a failsafe that turns itself off if anything near it heats up too much. The repair man just came out and removed the part that was overheating and then reset the unit. Maybe that is something you could try looking at.
2006-11-30 01:52:55 · answer #4 · answered by Johnny Z 2 · 0⤊ 0⤋
I've never heard of anything like this before. I'd be concerned about the gas, of course - but you've checked that. I just wouldn't want any gas accumulating in your basement.
Do you have a BOCES (teaching things like this) or know anyone who works for your gas company you could ask?
Otherwise, call the gas man - better safe than sorry, although your gas company may cover something like this (unlikely).
2006-11-30 01:56:41 · answer #5 · answered by 34th B.G. - USAAF 7 · 0⤊ 1⤋
definetely need more info here, standing pilot flame?hot surface ignition? Is your furnace an old basic one or newer electronic?
2006-11-30 01:54:20 · answer #6 · answered by T square 4 · 0⤊ 0⤋
Not knowing the type of furnace you have I would say You have a problem with the circuit board.
2006-11-30 01:53:43 · answer #7 · answered by Thomas S 6 · 0⤊ 1⤋
your area around the furnace may be to cold and causes the system to take to long to heat thus the system shuts down. make sure the area around the furnace is heated or warm then try to turning it on.
2015-02-09 12:10:34 · answer #8 · answered by tony the tiger 1 · 0⤊ 0⤋
maybe try to dust everything in the furnace make sure its clean. but i would call a repair man.
2006-11-30 01:57:56 · answer #9 · answered by misty blue 6 · 0⤊ 1⤋
Call a repair man. No sense in messing around with gas.
2006-11-30 01:57:09 · answer #10 · answered by Gone fishin' 7 · 0⤊ 1⤋