JimH wrote:
> Ric Seyler wrote:
>> Well broke out the ole girl a couple weeks ago..
>> Had to put in a new battery, old one wouldn't take a charge.
>> (it was several years old)
>>
>> First day on the road the AC (Auto Option Equipped)
>> would blow out of the defrost vents, with very very little
>> coming out of the dash vents. Seemed cool temp wide.
>>
>> After driving for a while it "Seemed" to divert a little more
>> to the dash vents... "Seemed" to.
>>
>> Broke it out again today and it's not very cool at all.
>> Checked the compressor and it would cycle, 10-15sec
>> on and 10-15sec off.
>>
>> I'm thinking a controller problem. Because to two
>> different symptoms.
>>
>> A little history.....the heater hasn't gotten warm for the last
>> several years, even after replacing the T-stat.
>> Sooo that also leads me to question the controller.
>> Maybe it's just gotten worse and has developed more
>> symptoms.. Any guesses?
>>
> When the heater in my '93 wouldn't blow heat, it was a clogged heater
> core. A flush, and it was as good as new.
>
> When the AC came out the wrong vents, that was a vacuum check valve. I
> went through a spell of vacuum problems. Apparently the check valves get
> brittle, and leak. Once they were replaced, I've had no more problems
> for two years.
>
> Hope this helps...
> --
> Jim
Hey Ric,
Vacuum switches/valves are an excellent idea.
After that, and before digging too deep,
check the contacts on the control head. In
humid climates those tend to corrode -- more an
issue in '92 and earlier but worth a look.
Comp cycling could be the result of a
failed electrical pressure sensor coming out of
the high side of the compressor.
--
pj
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