digital honeywell


Hello Mr Dominick

I had replace the old analog thermostats with a digital honeywell rth221b and all the wire correct but my heater is still not heater is using gas.can you help

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Phat 4 years 1 Answer 522 views 0

Answer ( 1 )

  1. If the wiring is correct. There is a 24 volt transformer on the heater. Check that for 24 vac

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