High line voltage: the unit may seem to run normally, but the compressor protector may be open (compressor and outdoor fan off).
Goodman H8 is high line voltage. The unit may seem to run normally, while the compressor protector may be open, leaving the compressor and the outdoor fan off. The only listed cause is supply voltage above the specified range. This entry does not state a voltage number, so Carrier's approximately 180 V figure from code 46 does not belong on H8. Both steps are technician steps: check that voltage at the system is within specification, and if it is not, check the voltage wires and involve the electric company. If the voltage is already within specification, replace the board. H8 does not include L8's breaker check.
Likely causes
- Supply voltage above the specified range
Safe checks for H8
- Techniciancheck that the voltage to the system is within specification; if not, check the voltage wires and involve the electric company if necessary
- Technicianif the voltage is within specification, replace the board
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Call a licensed HVAC technician (and the electric company if the supply voltage is high).
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Multimeter for appliance and HVAC diagnosis: guide
In this code: Supply voltage above the specified range
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