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mrad's avatar
mrad
Explorer II
Jun 19, 2023

Looking for advice on best way To keep large toy hauler cool

I have a 43' Cyclone with two AC units. One in the garage and one in the bedroom When the temps get above the mid 80's the AC units struggle to keep it cool. My wife thinks we should leave the vents open with fans on to pull the heat out. I think this would also put out some of the cold air.

I will usually set the temp at 74 in the morning when the the outside temp is under 73 With the fan set on high. I also leave the vents halfway open on the units and close the doors to the bedroom and garage hoping those rooms can then stay a bit cooler and allow the units to cycle to help keep the condenser from freezing up. I am noticing the dark gray color seems to like to pull the heat more than our previous white colored camper.

Any other advice?

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  • mrad's avatar
    mrad
    Explorer II
    Jun 19, 2023
    It's a 2015, guessing 2 was the standard then. I am considering running to COSTC0 and buying one of those free standing units that can cool 350 square feet and vent it out the window. Would be about 1/4 of the price of adding a 3 unit. Will 50 amp sites run three 15,000 btu AC's???

    I am also wondering why the second AC went in the garage. It is seldom used to house people.
  • Cptnvideo's avatar
    Cptnvideo
    Nomad
    Jun 19, 2023
    I'm really surprised the OP only has 2 units. We have a 42' 5th wheel (non toy hauler) and we have 3 A/C units. 2 will keep things cool (we set the thermostats to 78°) until it gets over about 95°.
  • time2roll's avatar
    time2roll
    Nomad
    Jun 19, 2023
    mrad wrote:
    I will usually set the temp at 74 in the morning when the the outside temp is under 73 With the fan set on high.

    Any other advice?


    Set the thermostat at 68 overnight and keep it running 24/7. Get another bed cover if needed.

    Vents closed unless you have just arrived with the interior at 100+. Close the vents when the sun sets.

    A/C with a wall thermostat will have a freeze sensor to cycle the compressor. Sometimes these fall away from the evaporator allowing freeze up. Get in there and check it. Access by removing the inside cover.

    While the lower cover is off check the plenum divider is properly positioned and sealed to direct all air to the ducting vs circulating internally. Poor installation methods are common. Get some tape and fix it.

    Try not to park broadside to the sun. Any shade helps too.
  • fj12ryder's avatar
    fj12ryder
    Explorer III
    Jun 19, 2023
    The best way to keep a 43' toyhauler cool? Add that 3rd AC unit. :)

    Seriously, the insulation in these trailers isn't the best by a long shot, and the main AC is just not going to do the job to cool the main part of the trailer. IMO the main AC should have been in the living area with some venting run to the garage. But even then it's going to struggle. There's a reason most big new trailers come with 3 AC's now.

    Your wifes's idea will do just as you expect: you'll pump out the hot air near the ceiling, but that hot air has to be replaced by something, and that something will be air pulled in from outside: hot air. So you lose some hot air, some cold air, and replaced by all hot air. Not a good solution.

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