Air Conditioning Works, just not while stopped? - Lexus IS Forum
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post #1 of 5 (permalink) Old 06-23-2010, 06:23 AM Thread Starter
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Air Conditioning Works, just not while stopped?

I searched the forums and found some A/C topics, but none specific to my situation.

So here it is; My air conditioning blows cold and strong while the car is moving and works like normal. When stopping at a light, stop sign, or idling in traffic, the air conditioning basically stops working after a minute or two. Air still blows through the vents, but it becomes hot air.

One thing I have noticed is that it sounds like the cooling fan turns off once the car is at a stop for a minute or two, and the air setting turns automatically switch from circulate to fresh air. No lights blink on the climate controls, the A/C light stays lit.

It leads me to believe that it has to do with the fan, more so than the A/C itself - such as the condenser, does that sound right? The car does not overheat when at idle though, which confuses me if the fan stops.

Once the car starts moving again, the air blows cold and strong again.

Any insight would be very much appreciated!!

2001 DWP.

never drive faster than your guardian angel can fly.
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post #2 of 5 (permalink) Old 06-23-2010, 09:01 AM
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Two possibilities.

1) check the cooling fans are working, and running with A/C on and stationary ( I expect this is OK)

2) Refrigerant level is wrong !!! Have you had Refrigerant added lately ?
If yes I suspect its overcharged

Check your sight glass and pressures.

2004 IS300 MSM LSD Manual 5 speed. new clutch 141K May2010, CDD delete
Lexus Key Hell survivor, 3 Master-keys now !!!
2003 Pathfinder SE 4WD
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post #3 of 5 (permalink) Old 06-23-2010, 10:45 AM Thread Starter
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1) When you say stationary - do you mean idling or A/C off?

2) No I have not added any coolant lately...never have - owned the car 3 1/2 yrs.

Where is the sight glass?

2001 DWP.

never drive faster than your guardian angel can fly.
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post #4 of 5 (permalink) Old 06-23-2010, 11:06 AM
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Quote:
Originally Posted by Gametime182 View Post
1) When you say stationary - do you mean idling or A/C off?
car idling, A/C on and car at 0 mph.

2004 IS300 MSM LSD Manual 5 speed. new clutch 141K May2010, CDD delete
Lexus Key Hell survivor, 3 Master-keys now !!!
2003 Pathfinder SE 4WD
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post #5 of 5 (permalink) Old 06-23-2010, 11:14 AM
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So its unlikely to be over charged.

here are the FSM instructions....


2004 IS300 MSM LSD Manual 5 speed. new clutch 141K May2010, CDD delete
Lexus Key Hell survivor, 3 Master-keys now !!!
2003 Pathfinder SE 4WD
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