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rebeccacaseyAug 1, 2025
What to do if the supply blower on my EngA Controller is not starting?
- EealvaradoAug 1, 2025
If the supply blower isn't starting, first check for 24 VAC on terminals “H and N”, and allow 45 seconds for the fan to start. Also, check for a shorted combustion air switch. Inspect the combustion blower motor circuit. Ensure there is power to the A/S terminal, checking for an open A/S or a failed combustion fan. Note that the S/A fan will start in 36 seconds after the pre-purge if there's no heat call, or the blower will start in 36 seconds.
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