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Tony,
The biggest clue is that you say the filter housing (receiver drier) gets
cold. This means there is a restriction or blockage there. The high side of the
system, which is everything from the compressor outlet to the expansion valve,
should be hot to the touch. After the expansion valve at the inlet to the
evaporator should be cold, and all lines going back to the compressor should
also be cool or sweating. Any restriction, anywhere in the system will cause a
problem. You already removed the EPR valve, so that eliminates that common
problem area, and you have changed the expansion valve, so that should not be
the problem. My guess is a problem in the condenser or the drier.
Don
Sent: Saturday, July 09, 2016 9:00 AM
Subject: [Chrysler300] Problem With Converting To
134A
My system
is a 1962 installed into my 1960 300-F.
A mechanic tried to convert to 134A
without taking the EPR valve out of the compressor. It worked great but would
freeze up the evaporator and stop working.
Sent everything to Classic Air for
rebuild and conversion. Their temperature switch makes and breaks power to the
compressor blue wire if there is a freeze up. This replaces the function of the
EPR pressure valve to cycle the compressor.
The evaporator is open and was blown
out with compressed air.
System was
charged and was not cold.
Classic
Air said it was a bad expansion valve. Replaced it and no difference.
They said
to charge the system with 134A at 80% of normal pressure. So they went down to
2.5 from 3 lbs.
Problem is
that the filter housing on the top of the condenser gets cold but the line does
not get cold where it enters the evaporator.
They put 4
lbs. in and I got 59 ° at the vents on the highway.
Pull off
to the side of the road, with engine running, to see it working well and the
cooling stops. Nothing frosting up.
Go back on
the road and the cooling does not come back.
Waiting
for another expansion valve and on/off switch to be delivered.
Will be
replacing both once they come in.
Any
insight about where we are now?
Thank you,
in advance, for any help or suggestions.
Tony __._,_.___ Posted by: <dverity@xxxxxxxxxxx> To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to https://groups.yahoo.com/neo/groups/all/manage/edit For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang __,_._,___ |
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