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Correction to earlier post Posted by walt [Email] ![]() ![]() In Reply to: Vern , thanks for the suggestion from the previous....., johnd, Mon, 7 May 2012 20:33:17 Members do not see ads below this line. - Help Keep This Site Online - Signup |
A/F switch prevents evaporator icing and high compressor pressure. Expansion valve controls amount of refrigerant entering evaporator based on temperature feedback it receives from its own sensing bulb, which is clipped and insulated around evaporator outlet pipe. If evaporator gets too cold, expansion valve/capillary tube control of expansion valve quickly reduces or stops refrigerant flow through valve. This feedback system is what prevents liquid refrigerant from slugging compressor. Still would not recommend bypassing A/F switch, because it prevents compressor from running against high pressure of a shut expansion valve, as well as preventing evaporator fin icing and poor fin-to-air heat transfer. Based on re-reading Haynes auto A/C manual 10425, for anyone that wants more info.
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