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Can't turn the knob to light my furnance - Heating & Cooling

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Did you try pushing the knob down? If you did, it is probably old and coroded and should replace gas valve assembly :-(

Posted on Nov 06, 2010

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1 Answer

Bryant furnace


Check gas valve is not on pilot only check air filter is clean check connections to gas valve .

Oct 10, 2017 | Heating & Cooling

Tip

How to make sure you Heat is working


A common problem with a furnance is the furnance will attempt to ignite, several times, you will notice that the house is not heating properly. You will hear the furnance come on and you will assume the heat is on, and the house will continue to be cool. You wiil check the furnance and you will hear it start up and the blower will come on, however a few seconds later after you have walked away the blower will shut down and there is no heat on at this time. You will again go check the furnance and after the furnance start and go through the cycle the furnance will shut down you will notice that the furnance has indeed shut down. This is the common problem of the flame sensor, you will have to remove the flame sensor, get a small piece of fine grade sand paper, and remove all the black colored carbon from the flame sensor until is is shinning bright, replace the flame sensor and attempt to start the furnance. You will notice that apatment or house have reach the set temperture, that the furnance has went through its cycle and the furnance will ignite and stay on continueously until the house obtain the preset temperture..

on Dec 13, 2009 | Heating & Cooling

3 Answers

I just lite by pilot light and the furnance will not go on. Does this mean that there is air in the line and gas will eventually flow to the unit and start heating?


If your pilot light stays on then gas is to that point. Make sure that you have turned control knob to gas on setting and thermostat is turned up calling for heat. If you still don't have any heat lightly tap on body of the gas valve. I know this sounds archaic but sometimes it works and it doesn't cost much. If your unit has a seperate thermostat you can remove the cover and base if needed to get to stat wires. Disconnect them and touch them together. If this brings the gas valve on then replace thermostat. If not I would change gas valve. Hope this helps you. Thanks

Nov 29, 2010 | Williams 2509612 Ceramic Mid-Size Heater

1 Answer

I have a RUUD Furnance with a piolet light. There


If you have a pilot, then this is an older furnace. Most of them use a 2 wire thermostat. Allot of the new digital, programmable thermostats require a 3rd wire - a common to the thermostat. Allot of old furnaces do not have a common terminal on the furnace board. It can be done, but takes a good technician. The way around this is to use a digital, programmable thermostat that will operate on straight battery. It will be stated on the thermostat package, saying it will operate with a common wire from the furnace or with only the use of the batteries.
Then make sure that you hook up the 2 wires to the "R" terminal and one wire to the "W" terminal, it doesn't matter which thermostat wire goes to which terminal.
Note: If you have a air conditioner installed, it will be a different story.
Sincerely,
Good Luck,
Paul Gibson

Mar 31, 2010 | Heating & Cooling

1 Answer

RUUD Air Conditioner not turning on


Need to check the breaker to the unit at the electrical breaker box. You should have a dual 60 amp breaker that runs the unit. Also if you removed the front of the furnance on the inside the system will not work unless the front of the furnance is on. There is a safety switch that will not allow the system to run with the door off. There could be the problem if the breaker is on and electricity is supplied to the unit that switch may be out and need replacing. The furnance is operated on 110 volts the condensor (outside section) operates on 240v you need to insure that the proper voltage is supplied to both.
Since both units work together yet operate seperately if the furnance comes on and the condensor doesn't then there is an electrical problem at the condensor (more than likely the contactor switch) if the condensor comes on and not the furnance then there to is an electrical problem (either 110 volts not supplied) or the switch to the safety cut off is bad. Now if neither furnance nor condensor comes on there could be improper power to both or a bad thermostat since the thermostat activates both furnance and condensor. Good Luck on repairs

Dave

Sep 04, 2009 | Ruud UBHC Air Conditioner

1 Answer

Furnance not starting


Try cleaning the flame sensor. Its the most common problem on todays furances. You should clean it with a fine grit sandpaper or emery cloth once a year.

Apr 11, 2009 | Heating & Cooling

1 Answer

My gas furnance will not stay on


This is probably the thermocouple that makes sure the flame is ignited. they can be cleaned with sand paper usually. it is located beside the burner within the fire. It will be very hot!

Apr 08, 2009 | Honeywell Electrical Supplies

1 Answer

Water keeps running into humidifier even furnance blower is not


This sounds like, the 550 transformer is not connected to the blower motor power connection (in parallel)

Feb 19, 2009 | Aprilaire 550 Humidifier

1 Answer

Furnance will not come on


No Blink? no call for heat. Check thermostat. Jump out thermostat. Check the fuse in the cabinet as well as in the breaker box. Do you have an emergency switch that may have been turned off? Make sure the door interlock switch is closed and working.

Jan 29, 2009 | Goodman GMS90703BXA Heater

1 Answer

Progrmmable Thermostate


Check to make sure you have pm or am set correctly. Or reset everything. ??? ;)

Dec 13, 2008 | Hunter Fan Company 5/1/1 Programmable...

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