Red light flashing 3 times. Pressure switch error code. Did pressure switch wire test and doesn't do anything. What else can I troubleshoot.
Restart the unit, jump the 2 wires to pressure switch as soon as the inducer came on, if it stay on replace pressure switch
Low gas pressure can be due to water buildup in the gas line trap. Turn off the gas supply and empty the trap.
SOURCE: Goodman Furnace GKS9 pressure switch problem
Disconnect the small hose that goes from the pressure switch to the inducer motor housing, at the housing, and stick a paper clip in the tiny hole, and pull it up and down, and twist it. this small hole is probably dirty. good luck.
SOURCE: 3 flashing light....Aire-Flo furnace AF80MPA100B5A
That control board is several hundred dollars. If I may make a suggestion, take a jumper and when the inducer fan starts, jump out the pressure switch. If it starts, it's not the board but a bad switch, hose or blocked exhaust vent.
SOURCE: getting 3 blinks on error code LED, checked
i take it the flash code 3 blinks refers you to the pressure switch...see the schematic. If this is what you are saying than lets move on... the voltage across the pressure switch should read 0 if the furnace is running and calling for heat. you dont need to check each wire to ground but across the two quick connect tabs. you will either read 0 or 24 volts (or there about). if you read 0 the switch is closed and functioning as designed. if it reads 24 volts it is open and there is not enough negitive pressure to close it. this can be due to a leak in the rubber tubing or a clog in the pressure switch, tubing, or induced fan housing connection nipple. the flue pipe may also be clogged or an improper cap is used at the termination. last is the wiring could be faulty going to and from the pressure switch. Hardly ever have we found a broken or faulty switch but it could happen. trust the board in most cases.
SOURCE: need help with a goodman gmt070 furnace
it may be clogged at the barbed fitting on the induced draft motor where the pressuer switch tubing connects. take a paper clip and **** it out make sure you can stick it thru freely till you can feel the Inducer wheel then reconnect and try again.
SOURCE: Need to find the pressure switch on my goodman furnace
It's mounted onto the gas valve. It will be a button or lever that you have to push in or down, depending on the style.
Restart the unit, jump the 2 wires to pressure switch as soon as the inducer came on, if it stay on replace pressure switch. if it cut off again it should read different code which is locked out. You can call me I will help you walk through 9015501503
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