where is the low pressure switch on a 2003 dodge ram 3500

Asked by Aug 29, 2012 at 07:47 AM about the 2003 Dodge Ram 3500 SLT Quad Cab SB

Question type: Maintenance & Repair

AC doesn't blow cold air. Already changed compressor/no change.  The low pressure side runs high at about 100 and keeps climbing.  The high pressure side is higher also.  Could it be a pressure switch and if so, where is it's location on the truck?

2 Answers

575

Have you changed the drier system out? The low pressure switch wioll be around it. Is the condenser clean? High pressure on the high side it restriction of air flow in condenser. The high pressure on low side is restriction going to evaporator coil in firwall. If line drier is cool on one side and warm on other you have a line restriction. Is compressorc cycling on and off be careful jumping low pressure switch.

1 of 1 people found this helpful.
575

Darn one more thing check for a filter in cab for evaporator coil it may be stopped up

1 of 1 people found this helpful.

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