wrote in message
...
On Apr 29, 9:18 pm, cjt wrote:
On 04/29/2012 07:44 PM, Tamara Lynn wrote:



wrote:
On 4/29/2012 7:29 PM, Tamara Lynn wrote:
wrote:

Just temporarily disconnect the thermostat if you
want to rule that out.

I pulled the batteries out of the thermostat for 10-15 seconds. When
I
put
them back in, the fan immediately kicked on and finally shut off.

Check to see if there is an LED light blinking on the furnace unit.
There
could be an error code. May be minor, may be major, may be nothing at
all. Worth investigating.

My Lennox system is 30 years old, I think before they got LED. :-)

Anyway, I went out and turned the pilot light to the heat (gas) and
then
turned off the gas to the unit. So far the fan hasn't came back on.
crosses fingers

Perhaps the heat on the flame on the pilot heated the central system,
and it
kicked on just to disperse that heat. At least that is what I am
hoping
for...sigh. I should have just rented a husband!lol

T

That's a very real possibility on a system that old.

I had the same
thing happen one especially hot day. For a complete solution I needed
to adjust the fan limit switch to not come on until it reached a
somewhat higher temperature (my furnace is in the attic, and here in
Texas it can reach 150 up there on a hot day, which is where the switch
had been set to turn on the fan during heating season).- Hide quoted
text -


If the attic is getting that hot, why blame the pilot light?
Those temps would make any furnace using a simple
thermo switch for the blower to go on. Not to mention
what those temps would be doing to your roof.

150 is not good for anything to operate. I'd have that attic very well
ventilated to get it down near ambient. Big fan at one end, big opening at
the other.