Goodman Condensing Unit GSX130241A

Discharge capacitor and remove wire leads

Set an ohmmeter on its highest ohm scale and connect the leads to the capacitor

Start the system and switch operation from COOLING to HEATING cycle.

Did the valve change its position?

Voltage Testing at Valve Coil Terminals

Test the voltage (24V) at the valve coil terminals while the system is on the COOLING cycle.

Is voltage registered at the coil terminals?

Thermostat and Wiring Check (Legacy Systems)

Check the operation of the thermostat.

Check the continuity of the connecting wiring from the 'O' terminal of the thermostat to the unit.

Ensure power is ON and unit is not running

Jumper defrost thermostat by placing a jumper wire across the terminals 'DFT' and 'R'/'R-DFT' at defrost control board

Connect jumper across test pins on defrost control board

Set thermostat to call for heating. System should go into defrost within 21 seconds

Immediately remove jumper from test pins

Check for voltage across terminals 'C & O'. Meter should read 24 volts

Check for voltage across fan terminals DF1 and DF2 on the board. You should read line voltage (208-230 VAC) indicating the relay is open in the defrost mode

Check for voltage across 'W'/'W2' & 'C' terminals on the board. You should read 24 volts

Remove the motor leads from its respective connection points and capacitor (if applicable).

Check the continuity between each of the motor leads.

Touch one probe of the ohmmeter to the motor frame (ground) and the other probe in turn to each lead.

Do the windings test continuous and no reading is obtained from lead to ground?

Disconnect the 5-pin connector from the motor.

Check for line voltage at terminals #4 & #5 at the power connector using a volt meter.

Is line voltage present at terminals #4 & #5?

Install gauges on the compressor

Verify that the suction pressure drops

Verify that the discharge pressure increases

Listen for normal compressor sound levels

Describe any unusual sound levels observed

Record the amp draw from tabulated values