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Question re Gas Furnace Pressure Switch

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Question re Gas Furnace Pressure Switch Pete 01-04-2008
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Posted by Noon-Air on January 5, 2008, 12:55 am

>
> Hi All:
>
> I'm having trouble with my 20+ year-old Sears 867.762340 gas furnace.

This is your problem....replace it and your problems will be solved.



Posted by The Freon Cowboy on January 5, 2008, 9:56 am
windy, weather ???????


>Hi All:


Posted by Pete on January 5, 2008, 10:14 am
On Sat, 05 Jan 2008 08:56:59 -0600, The Freon Cowboy wrote:

> windy, weather ???????

Interesting suggestion! It was quite windy when it failed yesterday, and
normally we don't get much.

However, the winds were gusty and intermittent. Wouldn't you expect the
furnace to start as soon as the pressure in the vent was OK? What happens
is that the furnace sits with the vent blower running, and it would stay
that way forever if I didn't do something.

Thanks

Pete

Posted by Don Ocean on January 5, 2008, 10:28 am
Pete wrote:
> On Sat, 05 Jan 2008 08:56:59 -0600, The Freon Cowboy wrote:
>
>> windy, weather ???????
>
> Interesting suggestion! It was quite windy when it failed yesterday, and
> normally we don't get much.
>
> However, the winds were gusty and intermittent. Wouldn't you expect the
> furnace to start as soon as the pressure in the vent was OK? What happens
> is that the furnace sits with the vent blower running, and it would stay
> that way forever if I didn't do something.
>
> Thanks
>
> Pete

condensation in the air tube.. Take it/them off and blow the itty bitty
moisture out and things will be fine.. Dew point cause that. No real
cure. Only happens in certain circumstances. Be sure there are no traps
in the line.(low points)

Posted by Zyp on January 6, 2008, 3:49 pm
Don Ocean wrote:
> Pete wrote:
>> On Sat, 05 Jan 2008 08:56:59 -0600, The Freon Cowboy wrote:
>>
>>> windy, weather ???????
>>
>> Interesting suggestion! It was quite windy when it failed yesterday,
>> and normally we don't get much.
>>
>> However, the winds were gusty and intermittent. Wouldn't you expect
>> the furnace to start as soon as the pressure in the vent was OK?
>> What happens is that the furnace sits with the vent blower running,
>> and it would stay that way forever if I didn't do something.
>>
>> Thanks
>>
>> Pete
>
> condensation in the air tube.. Take it/them off and blow the itty
> bitty moisture out and things will be fine.. Dew point cause that. No
> real cure. Only happens in certain circumstances. Be sure there are
> no traps in the line.(low points)

Sometimes I find tiny spiders have made a mess in the tube. [This is
usually when it sits for the summer, and the first firing doesn't work.]

--
Zyp



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