Forum Discussion

huron52's avatar
huron52
Explorer
Jun 24, 2015

Have heat not air why? But I had air before



Ever since I got the 5th wheel I have used my Air conditioner mounted in the ceiling and it has work fine. Last fall and again this spring I used the heater for the first time with no problem. Fired up, heated the 5th wheel just fine.

This week I went camping down in WV and thought to cool down the insides a little.
Turned the thermostat to cool and the fan in the heater came on. No matter what temperature I set the controls , the fan on the heater came on but not the air conditioner.
I was hooked up to 30 amp and other trailers in the campgrounds where running there air conditioners.

Does anybody think that there is maybe a problem with the thermostat? suggestions? Am I doing something wrong?
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    Jun 24, 2015
    YOu may have a bug.. A genuine bug,,

    Do you know why we call a glitch in a program a "BUG" (I do) (I even known someone who was there, at least electronically).

    The first computer developed a problem.. Turns out a bug (Insect) had gotten to a switch (relay I think) and was causing the problem.
  • huron52's avatar
    huron52
    Explorer
    Jun 24, 2015
    Yes in the picture the thermostat is set to off.

    So here is a follow up after posting this thread. The trailer sitting in the driveway at home plugged in to a 15 amp I turn the thermostat to cool and the air conditioner runs.
    Now I have air !
    I play with the settings, air then heat and air and back to heat back with some time between each setting , they both work.
    Ok it has me scratching my head.

    thanks for all the comments.
  • Chris_Bryant's avatar
    Chris_Bryant
    Explorer II
    Jun 24, 2015
    I would also pull it off the wall to check the wires behind it, but it does sound like a bad t-stat.
  • dougrainer's avatar
    dougrainer
    Nomad
    Jun 24, 2015
    donn0128 wrote:
    Bad thermostat!

    According to your picture, you have the thermostat set to manual fan. Select auto fan and try again


    Will not make any difference if on Manual or Auto for the Roof AC to come on other than a few minutes time delay for the motor to come on, on Auto, and no difference about the Furnace fan motor. The wall tstat does NOT control the furnace fan motor operation. I doubt the wall tstat is bad. May have shorted or chewed wires, but not a defective tstat. Doug
  • donn0128's avatar
    donn0128
    Explorer II
    Jun 24, 2015
    Bad thermostat!

    According to your picture, you have the thermostat set to manual fan. Select auto fan and try again

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