Radiant heater fan wont turn on byself and stay on
The fan needs a push start then shuts off-causing heater to overheat and turn off.have tried cleaning and oiling it
fan wont start on its own and wont stay running causing heater to get too hot and shut off.have cleaned and oiledit
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if its the original model number without an b at the end it is supposed to shut off, if it is the 4604b the added a feature to keep the fan running anytime power was on to keep it from burning up the power strip, this was a temporary fix, i just picked up a new on tonight under warranty and it has a feature that lets the fan run for a while and then shut off, the newest model number is HA24-50m, is is the same heater as original but now only has 5000w and 3000w options on switch, good luck finding a listing but this is the heater northern tools gives you when they replace the 4604. im pretty computer savvy and i can not find any site that is for profusion heaters as a company, here is a number for tech support you can call, 1-866-206-0888
It may be getting too hot and activating the safety shut off. This may need a new board. I have never worked on one of these but it has to be fixable. Depending on the cost of the unit as to whether or not it is worth it.
The thermocouple has to be in contact with the flame at all times when pilot is lit, this heats up and sends mill-volts back to the safety valve to keep the gas on, if not it won't let the gas through, otherwise you need to clean the pilot or replace the thermocouple if everything else is ok..