Overheats when idle AC on

FARHAN UL HAQ

MEMBER
2013 MITSUBISHI PAJERO
3.5L
6 CYL
4WD
AUTOMATIC
110,000 MILES

When it is too hot, on idle AC on starts heating up, if switch off the AC, the heat needle goes back to normal position.

Monday, July 2nd, 2018 AT 1:12 AM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,356 POSTS

Hello,

With the engine running and the AC on can you hear the radiator cooling fans running?

Please let me know, Cheers, Ken

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Tuesday, July 3rd, 2018 AT 1:17 PM

FARHAN UL HAQ

MEMBER
2 POSTS

Yes fans are working fine. Just have a doubt that is there any possibility of A C compressor load is creating the problem? Because when AC switched off the needles comes back. When the car heats up, the AC stops blowing cold air.

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Sunday, July 8th, 2018 AT 3:36 AM

KEN L

MASTER CERTIFIED MECHANIC
48,356 POSTS

The compressor will not cause the engine to heat up. Can you see if there is an obstruction in front of the radiator like a plastic bag? Also, it sounds like the engine could be close to overheating. Here is guide that will help you troubleshoot the problem:

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Please run down this guide and report back.

Cheers, Ken

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Friday, July 13th, 2018 AT 4:45 PM