Electrical: Boiler tips
Short, practical technician tips on electrical for boiler. Check each one against the manual for your exact model before acting.
Boiler wiring polarity
Generic
Black lead should be hot, white neutral at the service switch; wrong polarity upsets flame rectification controls.
Outdoor reset max must be below boiler high limit
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Otherwise the limit interferes; never wire any reset control to bypass the high limit.
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.