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Barkoff's avatar
Barkoff
Explorer
Aug 12, 2015

Bummed, barely used AC already Not Performing.

I can't believe my AC is already in need of attention!

I have a Lance 950 with Colman Mach on the roof, the blower is blowing well, the air starts out cool not cold, then instead of getting cooler, seems to warm.

The Camper is a 2013, not much use, but the generator and AC gets run for fifteen minutes at least once a month. Have never used the AC for more than a half hour. When it worked, it did a bang up job.

Any ideas, is it common for AC units to lose their coolant charge this soon? The camper has not been in any dusty areas yet,I doubt the filters or coils are dirty, only urban camping out on the wharf or along the cliffs. Are rooftop units that temperamental?

Dammit!
  • Old-Biscuit's avatar
    Old-Biscuit
    Explorer III
    Aug 12, 2015
    Return air goes thru filter then thru evap coil to get chilled then over to discharge plenum where it get blown into rig
    The wall between return side and discharge side should be sealed so cold/warm air no not mix.

    That is the 'divider'

    Also........2013 year.
    Have you ever cleaned the return air filter?

    They are NOT your household type filters that can go a whole season .....once a month even when not being used much. Just a thin foam filter.
    Also evap coil.it gets dirty....poor cooling capability
  • newman_fulltime's avatar
    newman_fulltime
    Explorer II
    Aug 12, 2015
    Barkoff wrote:
    newman fulltimer wrote:
    make sure the devider is sealed and tight(the foam board between intake and exhaust)


    Don't know a thing about AC, but we are taking off on Friday, I'll go up top tomorrow, pop the cowling and see if something obvious calls to me. I'll look for that divider as well. Is the problem most likely up on the roof, or under the cowling inside the camper? I'm guessing up top is the place to start?

    Only so much I know what to look for before I'll have to take it in and pay somebody.

    it's inside where the filter is drop your interior cover
  • MEXICOWANDERER's avatar
    MEXICOWANDERER
    Explorer
    Aug 12, 2015
    The roof airs on my rig used to run smooth when just the fan was turning but when the compressor started in a person could feel the shuddering. Dang frustrating right before a trip! Best of luck for a fast fix!
  • Barkoff's avatar
    Barkoff
    Explorer
    Aug 12, 2015
    newman fulltimer wrote:
    make sure the devider is sealed and tight(the foam board between intake and exhaust)


    Don't know a thing about AC, but we are taking off on Friday, I'll go up top tomorrow, pop the cowling and see if something obvious calls to me. I'll look for that divider as well. Is the problem most likely up on the roof, or under the cowling inside the camper? I'm guessing up top is the place to start?

    Only so much I know what to look for before I'll have to take it in and pay somebody.
  • jmcgsd's avatar
    jmcgsd
    Explorer
    Aug 12, 2015
    Had a similar problem on my 981 Max (2005). It wa ultimately repaired under warranty by adding a valve so coolant could be added. Lance first insidted that they were going to replace the unit but because FEMA was sucking up every RV A/C to equip trailers for Katrina victims none were available.

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