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Re: LP wall heater blower motor doesn't turn on
Does the heater burner come on? If the burner comes on then the problem is not in the t-stat. What is the model# & serial # and brand of heater. If you turn off power to unit and turn t-stat off, then turn unit back on then go to t-stat turn it up to temp. setting you want. Then you should be able to see heater gas valve opened and fired. If it has fired up then it will run for a couple of minutes before the fan will run. If you have anymore ? about the heater operation let me know.
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Either you have a pressure problem due to a frozen regulator on your LP tank or the air intake for the burner is clogged with dust/lint and/or pet hair.
Let's start with the frozen regulator on the tank first. Soak a bath towel in hot water, ring it out and quickly wrap it around the regulator inside the top of bonnet (lid) of the tank. Leave it in place until it becomes cool. Go make inside, light the pilot, holding the pilot Control Knob for at least 1 minute. After 1 minute, ease off the Control Knob and turn the knob to ON. Watch the flames to see if they are higher than before and it continues to burn normally. If it does, you've solved the problem.
Since this freezing may reoccur (especially if you're in an extremely cold environment now). Go back out to the tank and wrap a dry towel around the regulator, in an effort to stop it from refreezing. If your tank is in a shaded area and doesn't get much sun throughout the day, it could refreeze again.
As far as the air intake on the burner is concerned. You will have to remove the front half of the cabinet of the heater to access it. But, before we get into that, do the other recommended solution first. If that doesn't solve the problem, get back to me and I'll give you the instructions on how to clean the heater.
Too much gas pressure. Are you sure that this is a LP heater and not a Natural gas heater? Is the regulator you have rated under 1/2 pound pressure? Try to throttle down the shutoff on the tank to see if pilot gets better. If so, you have a pressure issue. Gas you adjust the pilot gas valve?
THE flame from the pilot should shoot past the thermo-couple and heat this up and make a small amount of mili- amps to prove the pilot light is lit. ..So if the flame doesn,t go past the thermo-couple it won, make mili-amps or its tme to change out the thermo-couple, They only cost lest than $8:00 and you can change it!
Check your thermocoupling to make sure that it is sensing flame. You can tell if it is good or bad by the white on the tip of the flame sensor. The other problem would be a blocked or closed flue pipe. Make sure that the cap is not smashed down on the pipe on your roof
there could be something stuck in the pilot assembly since you added a new tank to system. Check to make sure flame is hitting thermalcouple. Can you wait for a repair man to come and take pilot assembly out and clean. He will also replace thermalcouple. If you can't wait and you feel comfortable with taking pilot assembly out. Turn gas and electric off to unit then pull cover panel off. Pilot assembly is held in with two screws. Take tube off of gas valve and take off thermalcouple line off gas valve too. take out pilot assebly. Once you have it out take gas line off bottom of pilot assembly. There is a orfice in side make sure you can see through the orfice. You can also clean thermalcouple with a wire brush or sand papper. Reinstall pilot assembly make sure all fittings are tight. turn gas back on and light pilot. If everything looks good turn power on. Turn heat up run heater for a few minutes then turn heater down and let sit to see if it will stay on.