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08-26-2010, 03:39 PM
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#1
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Winnebago Owner
Join Date: Apr 2007
Posts: 115
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one more basement air bites the dust.
Air and heat pump has worked well for 10 yrs even on last trip to death valley 3 weeks ago. But no go this morning. So had to start trouble shooting to day. Compressure 1 will run but little cooling comp.2 will not come on. Opened up the side of mh and the controll box to the ac unit. Found the wire from the comp 1 relay burned and the wire from comp2 relay burned off of relay. So things realy got hot at some point. Was able to get new relays from dig a key for $9.84 each. Pt #T92P7D22-12 also had to make 2 new jumper wires and repace 4 quick connect ends on the wires going in and coming out of the relays. Total cost to fix less than
$30.00 and 4 hrs. ALL is good now works fine lucked out cheep fix.
__________________
2001 Horizon 2004 jeep GC
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08-26-2010, 03:44 PM
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#2
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Winnie-Wise
Join Date: Jun 2006
Location: Southern California
Posts: 489
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Quote:
Originally Posted by autofish
Air and heat pump has worked well for 10 yrs even on last trip to death valley 3 weeks ago. But no go this morning. So had to start trouble shooting to day. Compressure 1 will run but little cooling comp.2 will not come on. Opened up the side of mh and the controll box to the ac unit. Found the wire from the comp 1 relay burned and the wire from comp2 relay burned off of relay. So things realy got hot at some point. Was able to get new relays from dig a key for $9.84 each. Pt #T92P7D22-12 also had to make 2 new jumper wires and repace 4 quick connect ends on the wires going in and coming out of the relays. Total cost to fix less than
$30.00 and 4 hrs. ALL is good now works fine lucked out cheep fix.
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The more I hear about burned wires and relays I wonder if low power voltage can cause this problem?
Sammie
__________________
2015 Tiffin Bus 37AP
2016 Ford Explorer
"A Job Begun is Half Done"
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08-26-2010, 05:55 PM
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#3
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Winnie-Wise
Join Date: Sep 2002
Location: Fallbrook, Ca
Posts: 307
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That is exactly the type of problem that low voltage will cause. He got out lucky, there may have been a damaged compressor as well. That's why a Surge suppressor with a low voltage cut out is worth it's weight in gold.
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08-26-2010, 07:08 PM
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#4
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Winnie-Wise
Join Date: Jun 2006
Location: Southern California
Posts: 489
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Quote:
Originally Posted by SargeW
That is exactly the type of problem that low voltage will cause. He got out lucky, there may have been a damaged compressor as well. That's why a Surge suppressor with a low voltage cut out is worth it's weight in gold.
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Thanks Sarge, I do have a Surge suppressor and after hearing that there will be no more basement air units made to fit my rig I would like to learn all I can to preserve the one I have.
Sammie
__________________
2015 Tiffin Bus 37AP
2016 Ford Explorer
"A Job Begun is Half Done"
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08-26-2010, 07:47 PM
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#5
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Winnebago Owner
Join Date: Apr 2007
Posts: 115
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Yes low voltage will cause this kind of damage I do not think this was the cause this time. This is not the fist time I have had wires in the mh get hot I feel it is time caused oxidation of the push on connectors. Also the wire is of a minimal gage size. I would check the control box in the ac unit for signs of over heating befor this happens. Check the wires on the two comp. relays. I would also change the two jumper wires, one on each relay, to a larger gage wire as I feel this is the wires that over heated the most. Hope this helps.
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2001 Horizon 2004 jeep GC
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08-26-2010, 08:31 PM
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#6
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Winnie-Wise
Join Date: Jun 2006
Location: Southern California
Posts: 489
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Quote:
Originally Posted by autofish
Yes low voltage will cause this kind of damage I do not think this was the cause this time. This is not the fist time I have had wires in the mh get hot I feel it is time caused oxidation of the push on connectors. Also the wire is of a minimal gage size. I would check the control box in the ac unit for signs of over heating befor this happens. Check the wires on the two comp. relays. I would also change the two jumper wires, one on each relay, to a larger gage wire as I feel this is the wires that over heated the most. Hope this helps.
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Good idea! I like preventative maintenance.
Sammie
__________________
2015 Tiffin Bus 37AP
2016 Ford Explorer
"A Job Begun is Half Done"
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08-26-2010, 09:59 PM
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#7
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Winnebago Master
Join Date: Dec 2006
Location: St. Augustine, FL
Posts: 587
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Quote:
Originally Posted by autofish
I feel it is time caused oxidation of the push on connectors.
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I totally agree with Autofish.
If you feel competent disconnect the shore power.........genset off and disco each push on connector and push it back on. If it feels loose squeeze it tighter with some pliers. If you only do one at a time then a caveman could do it.
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KIX
'02 Ultimate Advantage 40J Spartan MM - Cummins ISC
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08-29-2010, 01:24 AM
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#8
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Winnebago Owner
Join Date: Aug 2007
Location: Killeen, TX
Posts: 84
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Quote:
Originally Posted by Sammie
Thanks Sarge, I do have a Surge suppressor and after hearing that there will be no more basement air units made to fit my rig I would like to learn all I can to preserve the one I have.
Sammie
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Replacement basement heatpumps are available at Winnebago and Lichtsinn motors. They use the new freon but can only be used on 50A coaches.
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Gene
MSgt USAF Retired
2012 Winnebago Sightseer 33C F-53
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08-29-2010, 02:23 PM
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#9
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Winnie-Wise
Join Date: Nov 2006
Location: Grayson, GA
Posts: 344
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Another thing that will cause the jumper wires on the relays to burn is if the push on connectors are not fully pushed on --- If a little space is left at the bottom, this will allow an arc to occur when the compressor is starting. Over time that will cause the push on connectors to start to melt and eventually will melt / burn the wire into. I just had to replace the jumper wire on my number 1 compressor relay (the insulation had been completely burned off before the wire burned into). I replaced the existing wire with #12 stranded wire which is heavier than the existing wire was -- it looked like a 14 gauge wire. Just make sure the female connectors are well insulated and pushed down all the way -- no room for an arc to happen.
__________________
Dave and Karen -- '02 Ultimate Advantage 36 C, 350 HP Cummins, Allison 3060 Tranny
'13 Ford Edge, InvisiBrake
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08-29-2010, 04:00 PM
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#10
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Winnie-Wise
Join Date: Dec 2002
Location: Draper, UT
Posts: 309
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Hi Ho: The connectors in question were made originally by Amp and a commonly called quick connects. I had a similar problem on the electric heater element on the water heater. This is also a high current connection. These connectors are made in at least two sizes and WI had used one size on the male end and the other on the female end.
This might not seem like a big deal, but actually resulted in a high resistance connection that came close to starting a fire. Luckily the wire burned through and limited the burned area.
So, the lesson is to be sure that the connectors are the correct ones, are clean, and fully seated. (Or better yet solder and heat shrink the connection) One can always cut the wire to break the connection for future service. It doesn't take much resistance to cause problems when the current is over 10 amps.
Dirk
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