Forum Discussion

jtad's avatar
jtad
Explorer
Jul 21, 2015

How much load on generator??

I have a 2004 Holiday Rambler Endeavor. 7500 Onan geni. When we bought it the previous owner said something about not running the AC's and fridge (on elec) at the same time. This past weekend in Texas near 100 degrees outside had the geni shut down a few times and throw the over heat code. Was running one AC and the fridge. Is this pulling enough load to cause the generator to run hot and shut down? I didn't realize until after I got home I could press the stop button after it threw the over heat code to find out more info. Have a weekend trip planned this weekend I guess I will learn more.
Class A

9 Replies

  • JR45's avatar
    JR45
    Explorer
    Jul 21, 2015
    May help
    https://www.youtube.com/watch?v=0LB5ZhvhXas
    JR
  • bluwtr49's avatar
    bluwtr49
    Explorer II
    Jul 21, 2015
    Mine did that and it was a slipping fan belt...very common.
  • JimM68's avatar
    JimM68
    Explorer
    Jul 21, 2015
    If it hasn't been serviced lately it should be. Oil change, coolant change, air and fuel filters...

    30 amps is nothing for those. It should happily run for days on a 60 amp load.

    when it stops and flashes the "01" overheat code, hit the stop button, it will flash a subcode.

    33 (3 a pause, 3 more) is engine overheat. Service the engine as I said above.

    34 is an inverter board overheat, this is a completely different thing and should be looked at by a real tech.
  • Ivylog's avatar
    Ivylog
    Explorer III
    Jul 21, 2015
    I would clean the radiator and tighten the fan belt or replace it.
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Jul 21, 2015
    ...... AC's and fridge (on elec) at the same time"

    Generator output.....7500W gen is capable of 62A but how is it wired?
    30A ???

    2 AC's and fridge......12A each AC plus 3A fridge....24A+3A=27A

    27A load on 30A gen in 100*F + temps.

    Then how much additional AC load......converter/charger, anything plugged into outlets, water heater on electric, ?????

    Generator in a compartment...air flow....AC load......High ambient temp...hummmmmm
  • jtad's avatar
    jtad
    Explorer
    Jul 21, 2015
    Was just serviced about 20 hrs ago. Rottela was used.
  • enblethen's avatar
    enblethen
    Nomad
    Jul 21, 2015
    No, one AC unit and refer should not cause genset to overheat.
    It could have dust in the compartment. Blow out good with air compressor.
    When was the last time the oil was changed/ What kind of oil was used/
  • Kayteg1's avatar
    Kayteg1
    Explorer II
    Jul 21, 2015
    Lot of reasons can cost generator overheat and high load might just speed up the problem.
    I would start with checking air flow on generator. Some of them have it poorly design and just adding some additional shielding can be big help.
    Adding a fan will help a lot as well.

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