Before you begin troubleshooting your goodman central air conditioner you will need to identify the problem that your system is experiencing.
Goodman furnace pressure switch test.
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The source of pressure switch problems can sometimes be a pain to track down.
Inspect the hose s connected to the pressure switch to make sure it is connected at both ends and is in good condition.
Basically the switch needs to be tested to see if it is closing when the pressure diaphragm pulls in.
First turn the power of the furnace off.
Remove the main access panel on the front of the furnace.
If your furnace indicator is blinking three times then the self diagnostic unit on your furnace thinks something is indeed wrong with the pressure switch.
Before you are able to troubleshoot your goodman central air conditioner you need to have a basic understanding of how air conditioners work.
Furnace pressure switch troubleshooting.
If you suspect that you ve got a goodman furnace pressure switch problem there is one easy way to tell.
At the core a pressure switch is the same as any other switch.
You should get a constant 24 volts between each of the two terminals of the pressure switch to a good ground on the furnace.
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Which is why i made this video that go.
Use an ohmmeter to check if the pressure switch is opening or closing properly when heat is called for.
A multimeter will be needed to test the switch for continuity.
To test the pressure switch use a multi meter and measure the continuity of the switch as it opens and closes.
Put the multimeter in the ohms position usually displayed with the ω symbol.
If the hose is cracked replace it.
This mostly involves the various components of an air conditioner as well as the sequence of operation.
I would suggest that you test the pressure switch with the furnace draft inducer running with the thermostat calling for heat.
How do you test the gas furnace pressure switch.
This means that once the component a pressure switch in this case is disconnected from the main body the a c unit in this case you can test the pressure switch as you would any switch.
To do this the pressure switch wires are removed and the furnace turned on.
