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11-16-2014, 03:29 PM
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#1
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Member
Join Date: Mar 2013
Posts: 39
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fuse keeps blowing help
I have a 20 amp fuse that keeps blowing on the 12v side. It days it powers lights but it also has something to do with the fridge. The fuse blows immediately when I replace it. What could be causing this. It is a 2008 sandpiper.
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2012 dodge ram 3500 dually
2008 sandpiper 305RGS.
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11-16-2014, 03:34 PM
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#2
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Senior Member
Join Date: Aug 2014
Location: Texas
Posts: 1,162
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If its feeding your fridg. Check the electric heater located outside in the back of the fridg. It may be bad and shorted to ground causing the fuse to blow. Try running the fridg. On propane.
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2014 Palomino Columbus 3650TH
435AH 12V VMax Charge Tanks, 520 watt Monocrystilline Solar Array, Morningstar MPPT TS-60 CC,Morningstar Remote,Cotek True Sine Wave Inverter,Cotek Remote Controller,50amp Progressive Hardwire Surge Protector
2015 Dodge 3500 6.7L 4X4
2011 CanAm Commander XT 1000
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11-16-2014, 03:42 PM
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#3
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Member
Join Date: Mar 2013
Posts: 39
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It's running to the fridge. I lost all the lights on the outside panel of it so I can't even tell if it was on. What does the electric heater look like? What is the purpose of the heater?
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2012 dodge ram 3500 dually
2008 sandpiper 305RGS.
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11-16-2014, 03:53 PM
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#4
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Senior Member
Join Date: Aug 2014
Location: Texas
Posts: 1,162
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I'd take a pic of it but no where close to my RV. The heater is what heats up the heat exchanger when on electricity, just like the propane heats it up while on propane.
__________________
2014 Palomino Columbus 3650TH
435AH 12V VMax Charge Tanks, 520 watt Monocrystilline Solar Array, Morningstar MPPT TS-60 CC,Morningstar Remote,Cotek True Sine Wave Inverter,Cotek Remote Controller,50amp Progressive Hardwire Surge Protector
2015 Dodge 3500 6.7L 4X4
2011 CanAm Commander XT 1000
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11-16-2014, 03:56 PM
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#5
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Senior Member
Join Date: Aug 2014
Location: Texas
Posts: 1,162
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Hey my buddy has one I can text you a pic to your phone pm me your number and I'll send you a picture. I can't post one from this phone.
__________________
2014 Palomino Columbus 3650TH
435AH 12V VMax Charge Tanks, 520 watt Monocrystilline Solar Array, Morningstar MPPT TS-60 CC,Morningstar Remote,Cotek True Sine Wave Inverter,Cotek Remote Controller,50amp Progressive Hardwire Surge Protector
2015 Dodge 3500 6.7L 4X4
2011 CanAm Commander XT 1000
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11-16-2014, 04:11 PM
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#6
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Member
Join Date: Mar 2013
Posts: 39
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So its a necessity then it's not something I can just bypass.
__________________
2012 dodge ram 3500 dually
2008 sandpiper 305RGS.
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11-16-2014, 04:27 PM
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#7
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Senior Member
Join Date: Aug 2014
Location: Texas
Posts: 1,162
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If you have propane you might beable to run off it. Turn your lights off and unplug the fridg. Replace the fuse and see if its your fridg or lights blowing the fuse. I text a pic
__________________
2014 Palomino Columbus 3650TH
435AH 12V VMax Charge Tanks, 520 watt Monocrystilline Solar Array, Morningstar MPPT TS-60 CC,Morningstar Remote,Cotek True Sine Wave Inverter,Cotek Remote Controller,50amp Progressive Hardwire Surge Protector
2015 Dodge 3500 6.7L 4X4
2011 CanAm Commander XT 1000
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11-16-2014, 05:14 PM
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#8
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Member
Join Date: Mar 2013
Posts: 39
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I tried replacing it with the lights off and the fridge unplugged at the 120v outlet in the outside access abs it still blew right away.
__________________
2012 dodge ram 3500 dually
2008 sandpiper 305RGS.
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11-16-2014, 06:02 PM
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#9
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Senior Member
Join Date: Jan 2014
Location: Minnesota
Posts: 762
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Try disconnecting the 12volt power to the frig. It is usually a black wire and a white white hooked to a small terminal block located behind the outside refrigerator access panel.
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Aviator Wright-Flyer#1908
1996 Holiday Rambler
2012 Ram 2500HD CTD
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11-16-2014, 06:14 PM
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#10
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Member
Join Date: Mar 2013
Posts: 39
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OK I will try that. On mine it is a red and blue wire?
__________________
2012 dodge ram 3500 dually
2008 sandpiper 305RGS.
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11-16-2014, 06:26 PM
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#11
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Senior Member
Join Date: Jan 2014
Location: Minnesota
Posts: 762
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I am not sure on yours. it is possible. It will typically be 2 wires that come in the to the ref. compartment and hook to a terminal block that is usually made of plastic. So basically look for two wires that come into the ref. compartment as opposed to wires originating in the ref. compartment. These should provide the 12v power needed to run the unit. The 120 volt outlet runs the electric heater while on shore power. The 12v runs the electronic controls.
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Aviator Wright-Flyer#1908
1996 Holiday Rambler
2012 Ram 2500HD CTD
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11-16-2014, 11:20 PM
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#12
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Member
Join Date: Mar 2013
Posts: 39
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OK I will try that. What could be the cause if the fuse doesn't blow while those wires are disconnected?
__________________
2012 dodge ram 3500 dually
2008 sandpiper 305RGS.
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11-17-2014, 03:17 AM
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#13
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Senior Member
Join Date: Feb 2012
Location: Clarksville Va.
Posts: 10,422
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You could have a short in your control board.
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Coachmen M/H
Concord
2018 / 300 DSC
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11-17-2014, 08:15 AM
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#14
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Senior Member
Join Date: Jan 2014
Location: Minnesota
Posts: 762
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Yes that's right. It could be the control board, the cooling fan, a shorted gas valve coil, a positive wire accidentally being grounded. If the fuse does not blow after disconnecting the main 12 v power source take a good look around for any signs of burnt components. First unplug the 120V so you don't get shocked. Then pull the cover off the circuit board and inspect. Checked the wiring for any chaffing of the wire's insulation. If nothing is obvious, electrically disconnect each component individually until the fuse no longer blows. This method may require a lot of fuses but should pinpoint the culprit.
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Aviator Wright-Flyer#1908
1996 Holiday Rambler
2012 Ram 2500HD CTD
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11-17-2014, 07:15 PM
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#15
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Member
Join Date: Mar 2013
Posts: 39
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Thanks guys. I won't be able to work on it till this weekend so keep the ideas flowing.
__________________
2012 dodge ram 3500 dually
2008 sandpiper 305RGS.
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11-17-2014, 07:22 PM
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#16
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Senior Member
Join Date: Apr 2012
Location: South Carolina
Posts: 1,441
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Suggestion: go to an auto parts store and get a circuit breaker the same size as the fuse that is blowing. Use it instead of fuses while you are troubleshooting. You could go through a lot of fuses before you find the problem.
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RamblerGuy
2011 Sunseeker 3100
2016 Ford Edge Toad
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11-22-2014, 10:49 AM
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#17
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Member
Join Date: Mar 2013
Posts: 39
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So I got around to working on this yesterday and it is the electric heater. How do you replace that? How hard is it to find?
__________________
2012 dodge ram 3500 dually
2008 sandpiper 305RGS.
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11-22-2014, 11:57 AM
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#18
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Senior Member
Join Date: Feb 2012
Location: Clarksville Va.
Posts: 10,422
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Quote:
Originally Posted by Horns07
So I got around to working on this yesterday and it is the electric heater. How do you replace that? How hard is it to find?
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Do you have the manual for the refer? It should show you a parts list and how it's put together. Is it Domectic or Norcol, I have the Norcol I think with the parts list would have to check, but do not have the Dometic version.
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Coachmen M/H
Concord
2018 / 300 DSC
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11-22-2014, 12:34 PM
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#19
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Phat Phrog Stunt Crew
Join Date: May 2012
Location: Upper Penisula Michigan / Arizona
Posts: 2,767
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Have you looked around to see if any others wires are pinched in a slider or door? If anything else besides the frig that doesn't work check it out.
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Ed & Ruthann / Toby and Tucker
2014 GMC Sierra Crewcab 2500 Duramax
2014 Wildcat 327ck
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11-22-2014, 01:27 PM
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#20
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Site Team - Lou
Join Date: Oct 2009
Location: South Eastern PA
Posts: 23,268
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Quote:
Originally Posted by Horns07
I have a 20 amp fuse that keeps blowing on the 12v side. It days it powers lights but it also has something to do with the fridge. The fuse blows immediately when I replace it. What could be causing this. It is a 2008 sandpiper.
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Is your fridge in a slide (pinched wire)?
The heater is AC and should have no impact on the 12 volt fuse blowing.
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Lou & Freya the wonder dog
2008 GMC Sierra 3000HD Allison Duramax
2019 Flagstaff 8529FL
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