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djsamuel
Cruiser Buff
PT Cruiser Club Member
Posted: Apr 10, 2008, 9:35 AM
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Air Conditioning "Thump"
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OK, here's a strange one. I recently changed the timing belt on my PT and as a result had to discharge my A/C. After I was finished, I pulled the required vacuum on the system and recharged it. The A/C works great, and I use it almost every day down here in Florida even at this time of year.
When I leave for work in the morning, I can turn the A/C on and there is no problem. But, in the late afternoon when I get back in my car to go home, when I turn the A/C on, about 1/2 the time there is a distinct "thump" I hear along the passenger side firewall. I can't tell if it is inside or outside. It only happens the first time I turn the A/C on, only in the afternoon after sitting at work, and I can't duplicate it the rest of the trip. It also occurs if I turn it to defrost, which also turns on the compressor. Even on the trip home, after the noise, the A/C is nice and cold.
The noise sounds like an air director flap gets stuck when it needs to shift and suddenly breaks free and slams into the open position. But I looked in the manual and can't see any type of flap that would move when the compressor turns on.
Any ideas? 
Thanks!
Doug
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Posts: 91 | From: Clermont, FL
| Registered: Feb 19, 2008, 7:44 AM
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wd4o
Cruiser Buff
Posted: Apr 10, 2008, 5:05 PM
Post #2 of 3
(223 views)
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Re: [djsamuel] Air Conditioning "Thump"
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Hi Doug,
Could it be the Recirculation damper opening or closing?
wd4o
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Posts: 69 | From: N/A
| Registered: Jun 30, 2006, 4:21 PM
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djsamuel
Cruiser Buff
PT Cruiser Club Member
Posted: Apr 11, 2008, 4:39 AM
Post #3 of 3
(213 views)
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Re: [wd4o] Air Conditioning "Thump"
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Quote:
Hi Doug,
Could it be the Recirculation damper opening or closing?
wd4o
I don't think so. I notice no change in the air flow before or after the thump. Unless, it is stuck halfway in a position and then moves fully to vent. Then there may not be a noticeable change.
Thanks for the thought.
Doug
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Posts: 91 | From: Clermont, FL
| Registered: Feb 19, 2008, 7:44 AM
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