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Old 10-26-2008, 06:27 PM   #1
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The fan on the furnance does not blow when on Auto, but does when on...


I have a Heil gas furnance. when i turn it on auto to come on and off when it reaches 68 i can hear it start up, but the fan does not kick in and blow. but if i turn it on "on" the fan is working. I changed the thermostat out and it still does not work.... thanks for any help...

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Old 10-26-2008, 06:33 PM   #2
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The fan on the furnance does not blow when on Auto, but does when on...


is there heat coming out when the fan is on?

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Old 10-26-2008, 06:34 PM   #3
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The fan on the furnance does not blow when on Auto, but does when on...


Is there a call for heat? Crank the thermostat up when it's on auto and see what happens,
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Old 10-26-2008, 07:36 PM   #4
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The fan on the furnance does not blow when on Auto, but does when on...


I am sorry i had problems replying..... the air is cold when it blow when the fan is on on
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Old 10-26-2008, 07:54 PM   #5
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The fan on the furnance does not blow when on Auto, but does when on...


go ahead jerry, i gotta get to bed... pressure switch?, dead birds/mice in updraft tube? will the mysteries never cease? nite all

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Old 10-26-2008, 08:00 PM   #6
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The fan on the furnance does not blow when on Auto, but does when on...


oh that does not sound good.... mice, birds,,,, no no.... i would do the electric stuff or circut stuff but not dead animals...thanks,,,,, j
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Old 10-26-2008, 08:40 PM   #7
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The fan on the furnance does not blow when on Auto, but does when on...


Circuit board probaly needs replaced.
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Old 10-26-2008, 09:21 PM   #8
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The fan on the furnance does not blow when on Auto, but does when on...


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Circuit board probaly needs replaced.
thanks...
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Old 10-27-2008, 06:43 AM   #9
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The fan on the furnance does not blow when on Auto, but does when on...


anything is possible at this point. how old is the furnace? (might not even have a circuit board) can you post a picture? will SD515 fly in, cape billowing and save the day? will 8-Ball roll along with his giant bag of tricks and have the answer? stay tuned tomorrow to this network and find out! same bat-time, same bat-channel!

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Old 10-27-2008, 07:23 AM   #10
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The fan on the furnance does not blow when on Auto, but does when on...


Limited info.
Permits wide guessing.
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Old 10-27-2008, 07:25 AM   #11
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The fan on the furnance does not blow when on Auto, but does when on...


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Limited info.
Permits wide guessing.
Flux capacitor?
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Old 10-27-2008, 07:45 AM   #12
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The fan on the furnance does not blow when on Auto, but does when on...


if it was the flux capacitor, there'd be green slime on the flammistat where it connects to the potentio valve, wouldn't there?

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Old 10-27-2008, 07:51 AM   #13
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The fan on the furnance does not blow when on Auto, but does when on...


Only if it was an inversed sine wave model.
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Old 10-27-2008, 07:56 AM   #14
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The fan on the furnance does not blow when on Auto, but does when on...


I recently installed an outside wood burner shaver 165 with an exchanger in my rheem furnace plenum. the exchnager is heating up nicely. when I set the thermostat to auto, the fan will not come on. I shut off the propane supply line, so it sounds like the furnace is trying to light then recognizes that their is no gas, so it shuts off. If I put the fan setting to manual it runs great but runs all night. I just want it to come on when the temp demands it and then shuts off when the room temp is satisfied.
is there a way to make the fan come on and off thermostat dictates?
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Old 10-27-2008, 07:58 AM   #15
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The fan on the furnance does not blow when on Auto, but does when on...


now hold on there.... ANYone knows if it was a inversed sine wave model, the slime would be blue!

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