Forum Discussion

Trixie47's avatar
Trixie47
Explorer
Jun 15, 2016

Converter Running all the time

Just got the 5er back from Camping World....converter had two blown fuses for the converter...got home plugged into shore power at home and the converter is running and not shutting off...only way to shut it down is to turn of the electric at the breaker switch. Battery wires hot also, on common side of battery (negative side). Anyone have any ideas what is going on? Sure hate to make a run back to Camping World with it again.!!! Already postponed two trips Lord knows don't want to have to do it again... Thanks :( PS nothing running in 5er.

19 Replies

  • The converter fan running all the time is not the problem,....maybe you missed that part. The problem is "why". And why the fridge and hot wires, dead batts, etc etc.
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    Ok, first.. Converters are supposed to run all the time, They run whenever the unit is plugged in or if you have a generator when it is running.

    Page 2; I assume you meant the converter FAN

    The converter fan is usually a 12 volt device and operated by a thermostat. Just sunlight on the compartment can turn it on.
  • Trixie47 wrote:
    In May we had to take it in because lights were dim and was worried it might be converter going bad...They said we had a blown fuse, but our 4 year batteries needed replacing..

    Bought 2 new batteries, installed them..two weeks later got ready for another trip and had trailer loaded, went out and turned on A/C, when lights got turned on A/C quit blowing, batteries went dead again...Another trip to camping world !

    Picked it up today and was told 2 blown fuses, which stopped the converter from running properly...All was suppose to be well now.
    Batteries were dead at dealer but they said since it had been sitting there for a couple weeks that was not unusual and they put a charge on them.
    Home: I can hear converter running and batteries are charged to 12 volts.

    On shore power and frig is now saying check instead of running on a/c.

    No more planning till this is taken care of....Thanks all


    Your air conditioner and fridge both need 12 volt to run thermostats. Even when using shore power. If you are getting error codes it means low or no 12 volt voltage.

    Converters can 'overcharge and boil' batteries. Been there did that and it was a bad capacitor in the converter. Air conditioning coming on but when it hit the temp set on thermostat it could not come back on because of low 12v to it. Same with fridge would run but when it hit set temp it could not come back on. Made all of us crazy thinking I had a couple of different problems when actually they all 'pointed' to a bad converter.

    Check the output of the converter and leave the tester on after if it does reache what it is rated for to see if it climbs.
  • Quote:
    In May we had to take it in because lights were dim and was worried it might be converter going bad...They said we had a blown fuse, but .(cut)

    Picked it up today and was told 2 blown fuses,(cut)
    -------------------------------------------------------------------------------
    Question to OP:
    Did they ever tell you why all these fuses blew ??
    I don't know if you know it or not, and not sure these so called professionals know either, but a blown fuse never blows for "no reason" It only blows when there is a problem, (defined as a "short circuit"or possibly an overloaded circuit.) If a reason for the blown fuses was not found, it can only be expected to happen again. And it seems like that is what is happening here. And there may very well be more than one problem.
  • Without taking a voltage reading on the batteries

    After they have sat overnight unplugged - disconnected, and separated

    Then when the battery cables are reconnected

    This is all blind guesswork.

    I can only shake my head at reading problems that are new and occur only after a rig is returned from a "professional" service center.

    A bad battery cell sucking THAT much power would be hissing and fuming like Mt Saint Helens, and smell like Norris Geyser Basin.

    Trixie47

    How mechanically inclined are you or your spouse? This is the thing to keep in mind, folks.
  • In May we had to take it in because lights were dim and was worried it might be converter going bad...They said we had a blown fuse, but our 4 year batteries needed replacing..

    Bought 2 new batteries, installed them..two weeks later got ready for another trip and had trailer loaded, went out and turned on A/C, when lights got turned on A/C quit blowing, batteries went dead again...Another trip to camping world !

    Picked it up today and was told 2 blown fuses, which stopped the converter from running properly...All was suppose to be well now.
    Batteries were dead at dealer but they said since it had been sitting there for a couple weeks that was not unusual and they put a charge on them.
    Home: I can hear converter running and batteries are charged to 12 volts. On shore power and frig is now saying check instead of running on a/c. No more planning till this is taken care of....Thanks all
  • converter.......2 blown fuses........continuously running.........cables hot

    Bad battery

    Disconnect battery cables (ground cable good enough---otherwise mark which is which POS/NEG so they get hooked up correctly)
    Then check each battery cell 'specific gravity'
    Suspect you have a bad cell


    OR take battery (batteries) to auto parts and have load tested
  • are you referring to the cooling fan ruining all the time?

    otherwise i do not understand since I thought that when on shore power the converter was always energized and working.
  • If batteries were run down the converter will run a lot.
    Hot cables or connections need to be checked. Maybe cleaned and tightened.
    If converter continues to run after 24 hours, have batteries checked. May have gone bad.

    If need be, I would look for a mobile tech rather than go back to the dealer.

    Maybe look for an electrical person to help you.