is this right
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Senior User
Joined: Mar 2003
Posts: 118
Likes: 0
From: mohave valley
is this right
well its winter here in wounderful arizona and ive been using my hearter the last few weeks. i just noticed if i switch to the defrost/floor position the air compressor engages. i also believe its engaged when switched to just defrost positon. thats with the heat control turned up hot. the compressor wont engage if i just have the setting to vent and the blower on, just with defrost and defrost/floor. is that how it suppose to work, seems like a waiste on the air compressor.
Senior User
Joined: Sep 2002
Posts: 167
Likes: 0
From: Alberta
Yeah, the compressor cycles on/off when using yuor defrost; this is to circulate the refrigerant and oil throughout the system during the months when you don't normally use your A/C, thereby keeping the o-ring seals oiled, preventing leaks. Other people have also suggested that the A/C dries out the air coming into the cab, so you don't blow moist air onto your windshield.
Last edited by aikigod; Nov 13, 2003 at 01:40 AM.
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
Yeah, the a/c is supposed to come on with the defroster. It clears a foggy window much better than if the a/c didn't come on. I don't think it has anything to do with circulating the refrigerant in the off-season, because it comes in handy on rainy summer days too when the windows fog up.
