monitor 442 fan problem

[mahrkus]

Hi all, have a monitor kero 442 heater and the fan runs constantly. I plugged it in and the "on" button was not even on and the fan was running. Turned it on got it running and up to temp then shut it down and fan never went off.
Any suggestions as to what could be causing this?
Thanks

[HayZee518]

fan

which fan? circulator or combustion blower?

[mahrkus]

fan won't shut off

circulator fan

[hawkins111]

M 422 or M441

When the circulating fan runs continuously you have either missed wired the overheat/ fan thermostat or switched the snap switches. The over heat and fan thermostats look alike but they are completely different. The overheat switches should show continuity on your meter. The fan thermostat should show an open.

Tom

[mahrkus]

Fan

When the circulating fan runs continuously you have either missed wired the overheat/ fan th? fan thermostat should show an open

Tom

Thanks Tom i will check it out.
Mark