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suprz's avatar
suprz
Explorer
Jun 03, 2019

Fantastic fan issue

Last year the fantastic fan in my RV was acting up. It is a powered opening and closing one with a rain sensor, 3 speeds and it is reversible also. It is controlled by a Honeywell thermostat on the bedroom wall. It was working when tucked away for the winter. I just tried it now and I get nothing. I have taken the cover off the thermostat and cleaned the contacts (it's got a spring mechanism) and I have continuity when the contacts close. But the lid won't open, the fan doesn't run, even when I manually open the vent lid. The fan spins freely, I went up on the roof and checked for any signs of broken wires, but there were none and the metal contact plunger for the vent lid is free and working also. I checked the fuses also and they all are fine....
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    Jun 03, 2019
    There is a fuse in the fan assembly if I'm not mistaken (3ag type glass cartridge) and one in yoru main fuse box.. Those are my prime syspects.

    I'd need eyes on for more than that.. I like that type of T-Stat in an RV. unlike some other designes it does not really care if it is a bit off level. like Works the same might be one degree off at 20 degrees tilt.
  • suprz's avatar
    suprz
    Explorer
    Jun 03, 2019
    Well, thanks for the replies, it turned out to be the 15 amp fuse was blown.. The reason I thought the fuse was good was because the fuses were mislabeled (go figure) I also tried the furnace, and it wouldn't come on either.. So that is how I found which fuse it was, they are on the same fuse
  • bgum's avatar
    bgum
    Explorer
    Jun 03, 2019
    There is a plunger switch pointing up and is about the circumference of a pencil. A little WD oil and massage it. It is stuck closed even when the lid is open.
  • landyacht318's avatar
    landyacht318
    Explorer
    Jun 03, 2019
    Recheck the contacts where the springs push the lid close contacts apart. I fixed a neighbors FF by spraying these with caig deoxit d5, several years ago. He had a replacement fan for me to install and i was almost ready to R&R when the d5 can started yelling at me. I'd gone through everything else first.
    Caig DeOxit is magic electric juice. No other contact cleaners compare.
  • Roger10378's avatar
    Roger10378
    Explorer II
    Jun 03, 2019
    Where is the power coming for the fan? On the one in my bedroom it comes from the light switch which I must on for the fan to work. Then I can turn the light on and off at the light.
  • suprz's avatar
    suprz
    Explorer
    Jun 03, 2019
    MEXICOWANDERER wrote:
    Handheld meter...

    How many OHMs resistance after you disconnect the power lead wires? You need to insure there aren't any in-series switches between the power inlet pigtail and the motor and lid opener


    The only thing before the fan is the wall mounted thermostat
  • MEXICOWANDERER's avatar
    MEXICOWANDERER
    Explorer
    Jun 03, 2019
    Handheld meter...

    How many OHMs resistance after you disconnect the power lead wires? You need to insure there aren't any in-series switches between the power inlet pigtail and the motor and lid opener

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