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Posted by Andy & Carol on January 17, 2007, 2:57 pm
>I had a similiar problem, the high voltage transformer might
> be going especially if it is older. You can test it by yourself
> if you have any electrical knowledge. Usually they swing out,
> make sure the furnace, is off at the main switch. I like to take the
> transformer out , and put is on the bench. after disconnecting the
> two wires.
>
> Get a lamp cord and connect it to to the wires of the transformer.
> Get a large screwdriver, with a good plastic insulated handle, put the
> screwdriver on one of the high voltage electrodes and move it slowly
> toward the second electrode. The spark should jump at least 3/4 of an
> inch.
> Nice and blue. If not your xformer is weak, easy to buy and replace, about
> $80.00
>
> Check your electrodes on the gun, they should be about 1/8" apart,and
> about 1/8"
> in front of the nozzle. While you got it apart, get another good quality
> nozzle,
> and replace your old one, with the same specs. Usually .75 to 1.50 @ 80
> degrees.
>
> Also, check your Cadmium cell and make sure its clean. If it doesn't see a
> good
> flame, it will shut the the gun down. Did you change the oil filter? If
> the air filter
> is plugged, proper air flow will not flow through the furnace, and shut
> it down on high limit temp. The oil pressure to the nozzle should be about
> 100 lbs.
>
>
> Have a pro set up the draft and air over the flame!
>
> My 2 cents worth..
>
>
>
>
>
>
>
>>I have an oil-burning furnace, with an intermittent problem. Most of
>> the time when the temperature drops below the thermostat level, it
>> kicks in just fine. But every so often, with no particular regularity,
>> it fails to start. I have to go down to the basement and press the
>> manual restart button (which always works with just one push). I have
>> found no factor that seems to explain when it fails to automatically
>> start. (For example, it seems no worse on particularly cold days, or
>> damp day, etc.) It is just that once every day or so, it fails to come
>> on.
>>
>> I have a service contract, and the furnace is old but has been
>> maintained. A couple service guys have been out to look at it, and
>> each has done a little something, but nothing has definitively solved
>> the problem. (I am embarrassed to admit here that I am NOT the
>> handyman type. I do not watch over their shoulders, and I do not know
>> precisely what they have tried.)
>>
>> I have a guy coming out again in a couple days, and I am hoping to be a
>> little bit better armed with knowledge, and be more involved in the
>> diagnosis. I was wondering if anyone has ideas on what sorts of things
>> could cause this intermittent problem.
>>
>> Thanks.
>>
>
>
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