Working on 69 Road Runner factory AC, previous owner updated to Sanden style compressor, all other parts appear to be factory or newer replacement of same style. I've noticed there is NO pressure switch of any type that would cycle the compressor, so the compressor runs ALL the time. This model originally used the EPR valve in the compressor which is obviously gone with the new compressor. What are you guys with factory AC using for switches when upgrading your compressor. I've seen the cycling switches that Bouchillon (and others sell) that measures temperature at the evaporator to turn the compressor on and off but wondering if they really work. The system works fine currently, but I'm concerned about a failure with the compressor not cycling.
1969 Road Runner Factory AC Upgrade - Compressor Switch?
- Thread starter Carl Ray
- Start date
the system use's an expatiation valve witch regulates the flow of the refrigerant no need for a switch. the new style compressor is more efficient and puts less load on the engine. don't worry as the compressor will live as long as there is oil in the system life of that compressor is 80 to 100000 miles.the e.p.a required a high pressure cut -out switch to prevent refrigerant from blowing in to the atmosphere.