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06-19-2013, 08:51 AM
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#1
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Senior Member
Join Date: Sep 2012
Location: South, La. AKA Cajun Country
Posts: 266
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Blower/fan shutting off while compressor running
I have a 2011 356QLB, I believe it has a 15,000 BTU A/C system. The issue I am having is that the blower/fan will kick off for a few seconds and then kick back on, while the blower/fan kicks off I can still hear the compressor running. It does not do this all the time, but it has done it enough to catch my attention. Any idea what may be causing this problem, or if it is even a problem? 
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2011 Puma Unleashed 365 QLB
2006 GMC HD Sierra SLT quad cab 4x4 6.6L LBZ Allison tranny
2008 Arctic Cat Prowler 650 H1
2006 Polaris H.O. 500EFI Sportsman
1996 Harley Davidson Heritage Softail
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06-19-2013, 11:33 AM
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#2
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Member
Join Date: Apr 2013
Posts: 74
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I noticed mine doing this a few days ago. I have my thermostat fan set to auto, and it was trying to switch it to low fan speed from high. It took it three attempts before the fan switched to low. It was in the evening, and I'm guessing the system figured out a lower fan speed would get the job done. It's just my impression. I'm not sure how smart the thermostat is.
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06-19-2013, 11:44 AM
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#3
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Senior Member
Join Date: Oct 2009
Location: Pilot Mountain NC
Posts: 558
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Yep, its the fan going from high to low or low to high. If there is too much of a difference ( 5 degrees maybe, check t-stat manual) the fan will adjust its speed to cool down the coach faster.
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2013 Prime Time 230 FBS
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06-19-2013, 12:16 PM
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#4
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Senior Member
Join Date: Sep 2012
Location: South, La. AKA Cajun Country
Posts: 266
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OK, that makes sense, but I thought the fan only had one speed. I guess I will have to find the manual and do some reading.
__________________
2011 Puma Unleashed 365 QLB
2006 GMC HD Sierra SLT quad cab 4x4 6.6L LBZ Allison tranny
2008 Arctic Cat Prowler 650 H1
2006 Polaris H.O. 500EFI Sportsman
1996 Harley Davidson Heritage Softail
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06-20-2013, 06:07 AM
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#5
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Site Team - Lou
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,269
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Quote:
Originally Posted by jlbreaux
I have a 2011 356QLB, I believe it has a 15,000 BTU A/C system. The issue I am having is that the blower/fan will kick off for a few seconds and then kick back on, while the blower/fan kicks off I can still hear the compressor running. It does not do this all the time, but it has done it enough to catch my attention. Any idea what may be causing this problem, or if it is even a problem?
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Not sure about that. My money is on "Your fan motor is overheating." There is a thermal switch inside the motor that can open when the windings get too hot.
Take the cover off and check for debris on the condenser cooling fan and lubrication on the fan shaft.
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Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
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06-21-2013, 11:18 AM
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#6
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Senior Member
Join Date: Sep 2012
Location: South, La. AKA Cajun Country
Posts: 266
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Quote:
Originally Posted by herk7769
Not sure about that. My money is on "Your fan motor is overheating." There is a thermal switch inside the motor that can open when the windings get too hot.
Take the cover off and check for debris on the condenser cooling fan and lubrication on the fan shaft.
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Thanks,I will check that for sure. It seems to me if the fan motor is getting hot wouldn't it kick off for more than one or two seconds? Just thinking out loud.
__________________
2011 Puma Unleashed 365 QLB
2006 GMC HD Sierra SLT quad cab 4x4 6.6L LBZ Allison tranny
2008 Arctic Cat Prowler 650 H1
2006 Polaris H.O. 500EFI Sportsman
1996 Harley Davidson Heritage Softail
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06-21-2013, 01:30 PM
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#7
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Site Team - Lou
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,269
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Quote:
Originally Posted by jlbreaux
Thanks,I will check that for sure. It seems to me if the fan motor is getting hot wouldn't it kick off for more than one or two seconds? Just thinking out loud.
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Yea, me too (without being there).
__________________
Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
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