Question about Tower Desa Natural Gas Heater - 25,000 BTU

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Desa Natural Gas Wall heater 18,000 BTU

The pilot light goes on and when you hold down the start button but after a minute or so when you release the button, it goes out. I am pretty sure it is 3/16" pilot tube that needs to be replaced but what do you think?

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  • jblumey Dec 14, 2007

    It is in my Garage and it is about 10 years old but really not used that much. I used to have it on low in the cold months of Jan, Feb but then I just had it turned on when I worked in the garage (I have a work area). Then a year ago, when I pushed on the start, as long as I held it down, it was on but when I released the button and turned it on it went out. Gas is coming out but will not stay lite. I cleaned everything but that did not work.

    John

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Hi i think you a right on the money with the pipe.
It could just be that their is a build up of dust causing the problem as this can happen if the unit hasnt been used often let me know how often its used and also the age thanks

Posted on Dec 14, 2007

  • paul proctor Dec 14, 2007

    Hi if the pilot light lights then you know that the pilot light works ok so then the problem must be a gas flow problem.
    the pipe dont need to be blocked fully to cause this fault as any drop in pressure will cause it to either not light or to go out it does this as safety feature to make sure the supply cuts off instead of filling room with gas.
    If you cant find fault yourself its best to call someone out who can test pressure for you.
    It could even be a faulty valve because with the temperature around the unit changing form warm to cold whilst it is not working this can cause slight differences in the valves controlling the flow of gas.
    So if your sure youve checked pipes and they are free from dust etc then call someone out its not worth messing with as can be extremely dangerous if anything goes wrong after you take apart also they will have proper equipment to test the valves and set the correct pressure.
    Without this equipment you wouldnt be able to test the pressure or adjust the pressure.
    Its not worth messing with unless you have equipment to test the pressure and also to test to see if their is any leeks because if thei is a leak this would also cause it not to light

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