Goodman Condensing Unit GSX130601A

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)

Is the system a legacy wired heat pump?

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

Check wiring visually for signs of

Use an ohmmeter to check continuity of any suspected open wires

Do any wires need to be replaced?

Replace wires with comparable gauge and insulation thickness

Temperature Test Lead Installation

Install a thermocouple type temperature test lead on the tube adjacent to the defrost control.

Insulate the lead point of contact.

Contact Closure Temperature Check

Record the temperature at which Part # 0130M00009P closes its contacts (2 and 2.5 ton units).

Is the closure temperature within 34°F ± 5°F for Part # 0130M00009P?

Record the temperature at which Part # 0130M00001P or B1370803 closes its contacts (3 thru 5 ton units).

Is the closure temperature within 31°F ± 3°F for Part # 0130M00001P or B1370803?

Record the temperature at which Part # 0130M00085 closes its contacts (units with 5 mm coils).

Disconnect all power before servicing

Remove the wiring from the control terminals

Test for continuity across the normally closed contacts using an ohmmeter

Replace the control if found open

Ensure the limits are cool before testing

WARNING: REFRIGERANT UNDER PRESSURE!

Refrigerant Handling Precautions

Charge the system with the exact amount of refrigerant

Refer to specification section or unit nameplates for correct refrigerant charge

Allow liquid refrigerant only to enter the high side using an ambient compensated calibrated charging cylinder

Close the valve on the high side of the charging manifold after the system takes all it can