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Generic problem for all Heaters

Wont stay lit after 20 min with blower on




By rangergi on Dec 30, 2007

" "
i have a procom 3panel natural gas heater serial #3351383-- model mn 180hpa w/manual blower pf06-yjlf. when in operation and the blower on it will run great for 20 to 25 mins and then shut down includeing the pilot light-- if i burn it without the blower on it will stay on great-- i checked the fan intake and it seems like it is blowing out cool air and the sides of the heater get hot to the touch--did my blower motor reverse rotation-- if so is a replacement blower available
Comments:

Dec 31, 2007

- I have been in the maint trade for 38 years and have done all the leak checks and there are none, i was just trying to find out from the company if the blowers can reverse rotation and suck up all the combustion air and cause the ox depeletion sensor to shut it down since it works like normal when the blower is not in operation

Dec 31, 2007

- the thermocouple seems ok the pilot will stay lit for days on end and if i di a shutdown of the system and then try a relight the therm and pilot will work in a min at most-- it really has me puzzeled

Dec 31, 2007

- no themostat--

Jan 01, 2008

- thanks, got a new blower and now it works fine-- sems the blower got hung up and then reveresed , dont know how it happened but with the new blower it is cooking good and i have a warm worlshop in the frozen north of michigan when the outside temp is 20f outside and my shop is 62finside -- happy new year

Solution #1

posted on Dec 30, 2007
Somewhat Helpful)

justaplumber

Rank: Guru 
Rating: 85%, 122 votes
As a licensed plumber I will recommend now that you don't touch the heater. Gas is dangerous and leaks aren't easily found.

Everytime a gas heater is serviced the tradesman needs to do a gas check to see if all is working well. There are too many things that can go wrong, from a small gas leak to burnt gas leaking, all of which are lethal.

I can tell you how to fix it, but I won't, because it is too dangerous.

Getting a repair man will cost you, but not getting one may cost you your health or your life.
Comments:

Dec 31, 2007

- Have you checked the thermocouple, they cause problems like this when aged.

Dec 31, 2007

- Does the heater have a thermostat? If so, the thermostat may be faulty, causing the heater to do anything from slow the flame down to cutting the heater off. From what you have said it sounds like this could be the problem.

You will need to look at your service manual to see how to fix it as all heaters are different, especially country to country.

Usually the thermostat is a replaceable part of the heater, so this should be doable.

Dec 31, 2007

- Sorry, cant help any further without seeing it.
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