Re: 405 A/C problems, part 2

Jim Kurtz (JFKurtz@erols.com)
Mon, 17 May 1999 10:11:30 -0400

Here's another guess - How about the AC evoporator freezing up. Warmer
days tend to have more humidity and are more prone to blockage than less
humid days. When the cooling quites do you notice any reduction in air
flow? When the AC quits, is the compressor still running (the center hub
turning)? If no, then its an electrical/control problem. If yes, look for
blend door, air routing type problems. FYI, freeze up of the evaporator is
usually caused by low freon and is cured by charging the system to the
correct level.
JimK

At 09:53 AM 5/17/99 -0400, Adam_Rodnitzky@ACML.COM wrote:
>
>
>This is certainly an odd problem, but I will hazard a guess here (by the way,
>that is all this is, but it seems that this idea makes sense). Given that
all
>US-market 405s have an automatic climate control system, is it possible
that the
>cabin temperature sensor is bad? Perhaps it is sending the wrong signal
to the
>climate control ECU which is then opening the heater flap, if even only
>slightly? Could be a possibility, anyone want to back up or disprove this
>theory?
>
>Adam
>'89 405DL (with great A/C)
>
>It's looking a bit different now. All last week, I ran the A/C as much as
>possible, and 90% of the time it froze me out! I can live with that. But
>then it ocurred to me that the weather was rather average spring-like
>temperatures, probably never more than the low 60s. Over this weekend,
>another thousand miles on the odo. Saturday, outside temps in the low
>70s, no A/C except for the first mile. Sunday, temps in the low 80s, and
>tons of real, regulation A/C for the first four hours of driving, then
>just street air for the remaining four hours (outside temps probably
>worked their way down below 70 by the time I got home).
>
>So - I can usually have air conditioning on cool days, and may or may not
>have air conditioning on warmer days.
>
>Any ideas, what the heck is going on?
>
>
>
>
>
>
>
>