steady off
Moderate
Goodman · HVAC Systems (AC, Furnaces & Heat Pumps)
24V Power Absent to Control Board
Quick Answer
Error code Steady OFF on your Goodman HVAC Systems (AC, Furnaces & Heat Pumps) means: 24V Power Absent to Control Board. This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Verify the furnace circuit breaker is on and power switch is in the ON position
2
Check the 3A or 5A fuse on the furnace control board and replace if blown
3
Measure the 24V transformer output (should be 24-28VAC across the secondary)
4
If the fuse blows again immediately, disconnect thermostat wires to isolate a short
5
Reconnect wires one at a time to identify the shorted circuit
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
3A or 5A fuse
24V transformer
Thermostat wire
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