This is a unform delivery van, similar to the old Chevy P30 step vans. Had a complaint of A/C not cooling well; checked and found 75 deg vent temp at max a/c setting and low speed fan. Compressor running all the time, doesn't cycle on/off either at idle or at 2,000 rpm. Low pressure reading was 45-50 psi with a rapid needle flunctuation; the high pressure was 290 psi steady. Checked the heater core to be sure it was shut off during a/c operation; inlet hose temp was 155 deg. And outlet hose temp was 95 deg. The heater and evaporator cores are housed / mounted together and the fan pulls air through them; the evap. Core was full of dust so I split the two cores, combed the evap core fins and blew compressed air through both of them to make sure they could pass air OK. Have done all this and still only get 75 deg. Vent temp.
have the same problem?
Tuesday, August 18th, 2009 AT 5:48 AM