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Turned on furnace no heat was coming out, but the pressure switch says its stuck open. what do i do?

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  • tt_1125 Nov 17, 2008

    We are having the same problem. Did you happen to get your problem fixed?

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  • 124 Answers

Call a pro to replace the blower, or the draft induced motor or the switch. gas is nothing to play with.

Posted on Oct 19, 2008

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1 Answer

Furnace wont run until i pull a hose from the pressure switch


ok that switch is called proving switch and if it runs when you pull hose off that means switch is stuck-, normal ops- call for heat power fan inducer start and closes proving switch normally two are a dual switch positive connects to fan discharge and negative connects to heat exchanger (fan suction )this is to insure air movement threw heat exchanger( pressure differential )then and only then a trial for ignition starts check for clog in other end of tubes

Feb 21, 2014 | Honeywell Furnace Air Pressure Switch...

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Goodman Gas Heating A/GPG13 Not Heating - Pressure Switch Stuck Open


Clear the little hole where that hose go to the inducer case

Feb 10, 2013 | Goodman Manufacturing Goodman...

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Why does the led on my furnace control bd flash three times


Hello, this indicates a open limit switch. A limit l switch will open when the temp in the heat exchanger gets too high and this switch shuts the Furnace down for safety. Usuaully a dirty filter, weak blower motor, dirty blower wheel will cause a limit switch to open.

Nov 12, 2011 | Air Conditioners

1 Answer

My furnace is telling me that i have an open pressure switch via the trouble code on the circut board. its a weatherking furnace jmercadante01@hotmail.com


Hi,
If the pressure switch is open, that means that the inducer is not moving enough air to close it, the pressure switch is bad, or the heat exchanger may be cracked.

Check for air flow...go outside and see if air is coming out the vent pipe....make sure there is no water built up inside the vent pipe.
Make sure the air intake pipe is ope and not clogged if you have a two pipe system...

Check the small hoses by the furnace for cracks or water in the hoses...
Check for condensate buildup inside the heat exchanger...

A cracked heat exchanger can also cause a lack of pressure and or pressure differential....

If everything else checks out then you may have a bad pressure switch... they DO go bad...

Here is a tip that will help you try to figure out why yourfurnace is not working.

BasicFurnace or Heating System Troubleshooting

heatman101

Mar 24, 2011 | Air Conditioners

1 Answer

I have an amana dms 90904cms furnace ..the fan runs but no heat. I opened cover and saw the red led blinking 3 times code says open pressure switch. what does that mean?


Open pressure switch is when your vent motor comes on it has to get a certain vacuum pressure or it won't ignite furnace. There should be some little black hoses connected to vent motor and maybe into heat exchanger, running to these pressure switches. Pull hose off one end and make sure hoses are not kinked or some times if hoses have sag in them they can fill with water. Other causes are if venting is obstructed or pressure switch is defective, especially if it got moisture in it.

Jan 26, 2011 | Air Conditioners

1 Answer

My central heating is on lockout and the burner is with red light


A sampling of various codes on a furnace

Read one LED flash that stays on continuously to mean your furnace has no signal coming from the thermostat and will not operate. Turn the power off and check the thermostat for improper settings or connections.

Interpret one LED flash that blinks on and off to mean your furnace has locked out because it could not ignite after three tries, and must be reset. Interrupt power to your furnace for 20 seconds or lower the thermostat so your furnace does not try to heat, then reset the thermostat to the previous setting. After one hour of lockout, your furnace will automatically reset itself and try to operate as usual.

Decipher two LED flashes to mean the draft blower is not working, or your furnace has a short in the pressure switch circuit. Turn off the furnace power and repair a short or replace the pressure switch.


Read three LED flashes to mean your furnace has an open pressure switch circuit or it has an induced draft blower operating. Check the pressure switch hose of your furnace for blocks or an improper connection. Also, look for blockages in the flue, and tighten any loose wiring.

Translate four LED flashes to mean your furnace has a primary limit circuit open, possibly from loose wiring or blocked filters. Check and clean filters, tighten wiring and check the flue for blockages.

Interpret five LED flashes to mean your Goodman furnace senses a flame without a call for heat. This could be from a gas valve closing slowly or a burner flame lingering.



Read seven LED flashes as a warning of a low flame sense microamp signal. This could happen with a coated flame sensor or a lazy flame from poor gas pressure. Turn off the power and adjust the gas pressure according to the information on the rating plate.



See eight LED flashes as meaning an igniter circuit problem due to a bad igniter or an igniter connected improperly. Replace the bad igniter or check the ground wiring, making necessary corrections.



Decipher nine LED flashes to mean the high-stage pressure switch circuit will not close during a high-stage-induced draft blower operation. Your furnace may have a pinched or blocked pressure switch hose, a blocked flue or loose wiring.

Read continuous flashing on the LED to mean your furnace has a reversed polarity of 115 volts. Turn off the power and correct the wiring polarity after reviewing the wiring diagram.

Dec 02, 2010 | Air Conditioners

1 Answer

My furnace isnt working the trouble light code says pressure switch stuck open or closed


The pressure switch, open or closed depends on the induce fan motor. the switch could of failed. Try blowing into it, in and out. And or your induce fan motor is not blowing out the excessive heat out of the furnace properly. We provide repairs in the So Cal Area.

Oct 07, 2010 | Air Conditioners

3 Answers

Furnace dont have heat


pressure switch stuck take off hose **** on it then put back on

Dec 21, 2008 | Amana PTC153B35AE Air Conditioner

2 Answers

Janitrol/Goodman GMP075-3 Draft Inducer Fan Won't come on


most forced draft fans are powered by 120 volts . close to the fan is usually a plug that unsnaps. create a call for heat after turning off to clear safetys and see if your getting 120 to fan on initial call for heat. if you are then fan draft motor is bad, usually sold as an entire assembly replace exact as it came out. sequence of operation is..... stat calls for heat via common and white wire to furnace , 24 volts. ......board sences call and sends 120 volts to forced draft ........ motor runs and creates pressure on proofing switch,....... switch closes 24 to board and tells it draft fan is on......... board then energizes ignitor,....... after ignitior glows gas valve is opened and burner lights ........ either ignitor or seperate sensor rod tells board the burner lit........ and a few minutes later the fan comes on and hot air is blown out. if a step is missed or doesn't proof the furnace either trys up to three times to light or locks out. turning off power usually resets safetys and it will resume attempts to lite normally.

Oct 25, 2008 | Air Conditioners

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