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I have goodman central air system. AC works, fan on works, heating does not. When I have heat on led flashes 3 times( pressure switch open), I blowed at the rubber hose and I can hear the clicks. I re

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  • tanimartini
    tanimartini Nov 06, 2012

    I changed the control board and now is working

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  • 9 Answers

Check to make sure the orifice on the inducer motor is clear if it is clear **** on hose going to pressure switch to make sure it closes if ur hear it click while sliwly sucking look to see if igniter lites if igniter lites ur heat should work if it doesnt lite then the pressure switch may be bad

Posted on Nov 09, 2012

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Posted on Jan 02, 2017

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22yooper
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SOURCE: Goodman CK60-1C model central AC unit blwing hot air

Clicking sound is the contactor engaging to start the outside unit. Check for a burnt off wire at the contactor. For some reason you are not getting power to the outside unit. If you find a burnt off wire shut off all power to it then remake the connection at the point of the circuit break.

Posted on Jun 27, 2008

  • 1 Answer

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

Induced Draft Motor Will Not Run

On furnaces with an induced draft motor, the motor must first come up to speed creating a negative pressure for the pressure switch. This switch must only be closed after the induced draft motor comes up to speed or the motor will not start. If this switch is jumpered (bypassed by the technician) prior to a call for heat the furnace unit will give an error code of “pressure switch contact failed in the closed position”. If the motor does not start check for induced draft motor wheel stuck or seized, lack of 115-volts to the induce draft motor, bad start capacitor on induce draft motor, defective inducer motor.

Posted on Oct 27, 2008

  • 1 Answer

SOURCE: Goodman GMS90904CXA Wont ignite, light blinks 3 times

I had the same problem, I had to remove the lower black rubber stopper right next to the exaust fan and hook up a drain to the unit, as soon as the water drained out the furnace fired right up.

Posted on Dec 11, 2008

  • 5 Answers

SOURCE: i have a goodman heat pump and all winter it

The reversing valve may be stuck or it has a burnt solenoid coil. Also, check the defrost relay accross the contacts with an ohmmeter and see if it's bad. Goodman heat pumps also trip on high pressure. There's a resettable switch on some units with a red button. However, I think the problem is in the defrost circuit or reversing valve. If your electric heat is on, change the board.

Posted on Apr 27, 2009

james3751
  • 614 Answers

SOURCE: ac fan on, blowing air, but not cold

Check outside unit if unit and compressor are running feel the large line to see if it is cold. If compressor is running and line is not cold possible charge problems. You may have a capacitor problem outside. they go out quite often. You can change this yourself, Open up outside unit and the cap is the silver bullet with terminals out the top. Bad cap can cause compressor to not operate and also the fan. You need to clean the coil inside or at leat check the coil to see if it is clean. You can clean theis with a toilet brush do not go against the coil bit brush with the fins. You may need to call a service tech but try these options first. russ

Posted on Aug 15, 2009

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1 Answer

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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1993 goodman status light 4 times blinking


Witch blower is running, the inducer or the systems blower?
System blower could mean the the high limit is opening and shutting down the systems gas train, I would check this out first.

The other problem could be with the pressure switch for the gas train, it is supplied from the inducer motor, check to see if it is operating fully.

HSI boards do go from time to time, this sounds more like a system control problem.

Jan 24, 2008 | Goodman GMS90703BXA Heater

1 Answer

No Heat


3 flashes indicate an issue with either the inducer, pressure switch, plugged condensate drain or a venting restriction.

Clear all debris from the exhaust and intake air piping. Make sure they are not drooping anywhere.
Check the pressure switch and the rubber hoses for blockage.
Blow out the drain line that evacuates the condensation.
On the inducer motor housing, un- plug the rubber hose going to the pressure switch and check to see if there is suction when the motor is running.
Make sure your air filter is clean.
Listen to the inducer motor as it turns for gurgling or any other abnormal sounds.

To make the heater run while you have the cabinet open, tape down the door safety switch. Remove the tape after diagnosos.

Dec 19, 2007 | Goodman GMS90703BXA Heater

1 Answer

Hello, our 4 yr old goodman gmv9-gcv9 two stage gas furnace stopped heating our addition, it has 3 flashes from the red LED code. it says the low fire pressure switch is stuck open. i took off the switched...


Check the air intake pipe and if you can , remove it from the furnace temporally. It will be the one going to the burner not the inducer fan. Inspect the exhaust pipe for any ice, sags where water could collect and any debris. Take a jumper and when the inducer spins up to speed, put the jumper across the two terminals going to the pressure switch. If the unit fires up, you have either a bad pressure switch or a bad inducer fan. If you get it running, check for vacuum at the pressure switch hose. Only one hose will have pressure. If none, bad inducer. Blow out any condensate hoses you have on it. Your pressure switch works on vacuum not pressure, so test by applying slight pressure and use a multi-meter.

Jan 23, 2011 | Heating & Cooling

1 Answer

I have a central air and heat heat uses gas so when the heat is on should the main fan be turning


Typical systems are designed with a thermostatic "fan limit switch" which protrudes into the heater (house air portion of the passages). The "fan limit switch" is mounted to, and protrudes into the duct within the burner section of the heater, near the heated metal.

This switch triggers the circulating fan to turn on only after the sensor (thus air) within the duct has reached well above ambient temperature. This design prevents the fan from coming on sooner and the system blowing cold air, which people don't like.

Depending on system design, installation and current operating conditions, the time delay from main burners on to fan on can be up to a couple of minutes.

This same limit switch, if the temperature goes high enough, will also turn the gas valve off; a fire safety function.

Jan 06, 2010 | Goodman CKL49AR49 Air Conditioner

1 Answer

Heater keeps going off on its on also fan not


Please provide more info. When it goes off does it come back on by itself or do you have to flip a breaker? Is the furnace gas or electric? If it is not moving enough air across your heat exchanger in a gas furnace or across electric heating elements this will trip a safety switch that will stop heating but not fan. Low air speed is most likely from inexperienced or improper duct design/ installation. Duct sizing is very important to move enough air. Don't believe me try breathing thru a straw. If your unit is a gas furnace it has a flashing code that will tell you what is wrong codes listed inside unit door. Could be lots of things. Reply with more info.

Dec 04, 2009 | Goodman Heating & Cooling

2 Answers

My heat unit will not blow hot air unless we go outside and hit a button on the back bottom of the unit. Once we do that it will blow hot air for that cycle. when it is time for it to come on it is cold...


If it does not have a furnace or heating elements for heating, then it is a heat pump, which is rare for a central AC system, but makes sense of the fact that it blows warm air when you reset the pressure switch, which may indicates freon pressure charge problem if your AC system has a reverse valve and uses freon to for heating (heat Pump).

Do you get heating when outside unit runs? if you do, check freon pressure levels and top up to required pressures. The button you depress is a pressure reset switch ... that is if your AC system is a heat pump ... which, as pointed above, it is not common for central ACs.

Nov 07, 2009 | Ruud Central System Air Conditioner

1 Answer

GOODMAN CMA80905CXBA FURNACE. INDUCTION BLOWER NOT ENERGIZING. GETTING 3 "BLINKS" FROM DIAGNOSTIC LIGHT (LOW PRESSURE SWITCH OPEN). THE A/C WORKS & THE BLOWER FAN COMES ON WHEN THE STAT IS IN...


the pressure switch is closed before the draft motor closes it.the board is telling you that this is not right.pull the wire(either) off of the pressure switch to see if furnace tries to light.if it does,you should replace the pressure switch.

Oct 02, 2008 | Goodman Heating & Cooling

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