I m facing an annoying problem..... whenever i Use my car AC. at day time it works fine...temprature gauge was not rise...but the problem is that at night on AC car temprature was rise and as i turn off the AC...tempraure goes down in 2 min....i can not understand this problem... need ur help
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weird. in hottest part of the day car does not heat up but it does at night
anyways get radiator/its cap/thermostat valve/fan/gasket checked
Get the a/c relay checked,it might be taken excessive current, causing for low fan speed.
try driving the car wid all the lights off then see.
^^^^Very very good point..... I must elaborate. With lights on, there may b some load on electrical system which causes the radiator/AC fan to run slower than normal.
I must say very very good point given by @Retailiator
This was the same problem with my dad's Merc the we were out @ night and the temp needle went up in secs then we turned the audio stuff and Cd changer off and shifted to parking lights then it came down by 5 mm and we Drove back home :S
Rusty : Abay ki merci ki show marni thi hena??
^^ok i am deleting my reply :S