Re: [A/S] AC repair needed

I have spent 40 years running old and new RV A/C units in Texas and in the
real world as Anne discovered they freeze up with the right set of
conditions. All I can say is that I diagnosed the problem from a lot of
experience on the first call.

Steve


On Tue, Jun 19, 2012 at 10:50 AM, Rick Kunath <k9ao@charter.net> wrote:

> **
>
>
>
> > In the small space of an RV the water vapor from humans, pets, cooking,
> > bathing and going in and out a lot and losing your cool air can cause a
> new
> > unit in perfect condition to
> > freeze up once temperatures get high enough it no longer cycles on the
> > thermostat which allows the condensate to drain off.
>
> Actually, the unit does not need to cycle to remove the evaporator coil
> condensate. This is an ongoing thing because of the temperature of the
> evaporator coil. The humidity will condense on the coil and drain
> continuously. Of course if it has frozen, switching to fan only for a
> while is the only way to melt off all of the ice.
>
> One thing I forgot to mention is that a dirty coil will freeze up easily
> too. When was the last time that evaporator coil was cleaned? The make
> special spray cleaner for just that job.
>
> And another cause of freezing is having the fan on low. You want a lot
> of air moving through the unit, so keep the fan on high. Get all of the
> cool from the evaporator coil as fast as you can.
>
> Also, take a good look and make sure that the unit is not sucking it's
> own just-cooled air back in. Make sure the input and output louvers are
> not sucking the cold air right back in. If they are rig something to
> stop that.
>
> Rick Kunath
> WBCCI #3060
>
>
>


[Non-text portions of this message have been removed]



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