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Old 03-05-2012, 07:50 PM   #16
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Furnace is condensating?


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Nothing last night/ 3 a.m. this morning... I dont know if you got the message about the coils underneath the furnance for the air conditioning... could the hot air mix with the (cool) coils causing condensation backing up in the furnance?
no that is not your problem...explain the operation as you see it...inducer comes on,,small delay as pressure switch pulls in...ignitor glows...pilot lights...5-10 sec burnners light.......

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Old 03-05-2012, 07:50 PM   #17
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Furnace is condensating?


Depending on how long i wait to check it ... sometimes a few drops... sometimes... more than a few drops...
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Old 03-05-2012, 07:52 PM   #18
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Furnace is condensating?


Nope it won't effect that at all.

This hose directly linked to the heat exchanger only.
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Old 03-05-2012, 07:52 PM   #19
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Furnace is condensating?


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Depending on how long i wait to check it ... sometimes a few drops... sometimes... more than a few drops...
plumber 101 mentioned check flue at top of furnace...may be bird got down..
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Old 03-05-2012, 07:56 PM   #20
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Furnace is condensating?


i wake up around 3 am... no heat through vent. turn off thermonstat... wait 10ish 15 minutes. turn on thermonstat... the filament glows red fire comes on for a few then turns off... i turn off thermonstat and back on... filament glows red... a blue flame comes on... wants to turn into fire but eventually goes out
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Old 03-05-2012, 07:58 PM   #21
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Furnace is condensating?


This problems seems to ONLY HAPPEN at night time when the temperature drops.. (when its really cool outside) because other nights it works just fine...
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Old 03-05-2012, 08:00 PM   #22
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Furnace is condensating?


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i wake up around 3 am... no heat through vent. turn off thermonstat... wait 10ish 15 minutes. turn on thermonstat... the filament glows red fire comes on for a few then turns off... i turn off thermonstat and back on... filament glows red... a blue flame comes on... wants to turn into fire but eventually goes out
that also looks like original ignitor/ senser ..could be this not sensing pilot going into lock out... could also be bad smartvalve...

don't explain why only does it at nite..
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Old 03-05-2012, 08:04 PM   #23
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Furnace is condensating?


want me to take a picture of it? The sensor is on the other end of the orange tube right?
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Old 03-05-2012, 08:06 PM   #24
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Furnace is condensating?


dirty pilot assy??
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Old 03-05-2012, 08:07 PM   #25
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Furnace is condensating?


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want me to take a picture of it? The sensor is on the other end of the orange tube right?
no the senser is with the ignitor .thats the part that glows red..this is not making any sense....only fails at nite..........
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Old 03-05-2012, 08:07 PM   #26
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Furnace is condensating?


had the piolot cleaned etc...
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Old 03-05-2012, 08:09 PM   #27
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Furnace is condensating?


Yes usually fails at night...
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Old 03-05-2012, 08:15 PM   #28
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Furnace is condensating?


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Yes usually fails at night...
Iam leaning towards a bad smartvalve or ignitor assy..only explanation.
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Old 03-05-2012, 08:18 PM   #29
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Furnace is condensating?


Has nothing to do with the air conditioning coils being directly underneath the heater?
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Old 03-05-2012, 08:22 PM   #30
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Furnace is condensating?


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Has nothing to do with the air conditioning coils being directly underneath the heater?
not really if the furnace over heats it trips the limit switch but then the switch cools down and resets itself and furnace restarts...from what you say when blue pilot lites..it is suppose to tell flame senser to light burnners...it does not..it goes out....this function is controled by the smartvalve...

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