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Old 04-06-2010, 02:03 AM   #1
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carrier gas heater


Hi,My gas heater is just stop working.Now the blower is keep running all the time no matter i turn to heat or ac.Normally when i put the thermostat to heat the furnace on for few seconds than the blower is running.Please help me any body.Thanks alot

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Old 04-06-2010, 05:17 AM   #2
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carrier gas heater


Is/was your air filter dirty/plugged?

Might be off on its high limit. When was the last time you changed/cleaned your air filter.

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Old 04-06-2010, 09:33 AM   #3
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My filter is brand new. The high limit sensor how is it work? when is it contact and when is it not contact? How can i test the high limit?Thanks Pro.

Last edited by trieuphu99; 04-06-2010 at 11:02 AM.
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Old 04-06-2010, 02:52 PM   #4
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carrier gas heater


The high limit is to be closed when ever the temp is senses is below its trip point.
It only opens when the air temp is TOO hot.

An ohm meter will tell you if its open or closed.


How dirty was your old air filter you just changed out?
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Old 04-07-2010, 12:03 AM   #5
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Thanks.I got it fixed.Again,thank you so much for help.
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