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marywmccall2022's avatar
marywmccall2022
Visitor
Jun 21, 2025

5th wheel living issues

We have a fifth wheel that we live in full-time (at least in the summers). We are running power to it from a shop my husband owns. I don't think the a.c. is big enough, it probably needs 2 a.c.s, but it only has 1. It's a 41-foot 5th wheel. 

The problem started when the temperature got too hot (90 degrees), and the heat was unbearable, so the A/C. wasn't keeping up. So we bought a portable one at Costco, which helps, but if we have anything else on with it, the breakers start flipping. It's a 30-amp breaker that flips. Also, the water pressure is not good. There are several other issues but does anyone have any help with these? I really need help!

 

 

 

 

2 Replies

  • marywmccall2022's avatar
    marywmccall2022
    Visitor
    Jun 22, 2025

    Hey, thanks so much for replying! I'm going to check on all your suggestions, I really appreciate it!

  • opnspaces's avatar
    opnspaces
    Navigator II
    Jun 22, 2025

    What is the power cord going to the shop? Is it a 4 blade 50 amp cord or a 3 blade 30 amp cord? Are there any adapters or extensions on the cord? 

    When the 30 amp breaker trips does the main AC continue running? If so you are probably on 50 amps.

    Without having any more information I can only hazard a guess. 

    If the 30 amp breaker is working fine with the portable AC unit running right up until there is a second significant load on the system. A load such as the water heater (on electric) coming on. Or the Microwave turning probably trips the breaker. If this is the case then you just need to be careful of your loads. Turn off or put the water heater on propane when you're running the portable AC. Temporarily turn off the portable AC to run the microwave. You can turn it back on once the microwave finishes.

    Lack of water pressure can be many things. Are you running your water off the onboard fresh water tank and pump? Or are you hooked up to water from the shop? 

    If it's lack of pressure and flow out of the faucets try unscrewing the aerators out of the end of the faucet. With the aerator off you'll know immediately if it was plugged up and causing the problem. If you're on shop water try putting water in the fresh tank and run off the pump. Is there a difference?

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