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Climate Control Problems (Air Conditioning, Heat) - All Cars

791 messages,  Last post on Aug 12, 2009 at 12:55 PM

You are in the Maintenance & Repair Forum. Your Host is mr_shiftright

What is this discussion about? Heating / Cooling

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#754 of 791 Re: 94 Saturn A/C solenoid problem [saturnowner1] by Mr_Shiftright HOST Jun 01, 2009 (6:14 am)
Replying to: saturnowner1 (Jun 01, 2009 6:11 am) Well okay we were on the right track---another 3 or 4 weeks and we would have solved it!!   Now think of all you've learned.   Anyway, if you had bypassed the low pressure switch, the compressor would have clicked on, telling you that there was low pressure in the system. Where did you get that 45 psi reading from? Oh, you said that was a guesstimate.... Replies to this message: saturnowner1 (Jun 01, 2009 6:32 am) Mr_Shiftright (Jun 01, 2009 7:04 am) obyone (Jun 01, 2009 1:14 pm)
#756 of 791 Re: 94 Saturn A/C solenoid problem [Mr_Shiftright] by saturnowner1 Jun 01, 2009 (6:32 am)
Replying to: Mr_Shiftright (Jun 01, 2009 6:14 am) The recharge kit I bought has a gauge on it, with the blue range ending at 45 psi, and then a yellow band, and then a red band. I stopped pressurizing when the gauge showed 45 psi, which only took a few seconds. When the mechanic did it, he applied a little more than the 45 psi, revved the engine, and then compressor kicked on. The low side psi went way down right away, and started to climb back up. he continued to fill it to about 20 psi, meanwhile the high side came back up into the 100 psi range, and the car cooled off. So now the low side runs at about 20 psi. Replies to this message: Mr_Shiftright (Jun 01, 2009 7:04 am) obyone (Jun 01, 2009 1:14 pm)
#757 of 791 Re: 94 Saturn A/C solenoid problem [saturnowner1] by Mr_Shiftright HOST Jun 01, 2009 (7:04 am)
Replying to: saturnowner1 (Jun 01, 2009 6:32 am) Oh okay I understand the sequence now---that makes sense.
#758 of 791 Re: 94 Saturn A/C solenoid problem [saturnowner1] by obyone Jun 01, 2009 (1:14 pm)
Replying to: saturnowner1 (Jun 01, 2009 6:32 am) One thing to note is that if you were low on R-134a you have a leak. It may be a small leak and require refills every three months but a leak none the less.
#759 of 791 Pressure differential question by rockindubya Jun 13, 2009 (8:53 am)
New compressor, dryer and manifold hose on 97 Chevy P/U. Pulled a vaccuum before charging. Old dryer had label that said "Charge w/ 2Lbs. R-134" I only put in 2 12 oz cans that day....Ambient temp was about 68 and pressure was about 30 low and 190 high... worked well until we hit 90 plus degrees (Texas here). My pressures now are 40 and 250.... I added 8 oz and went to 45 and 280!! pulled that back off and got down to about 35 and 230. Cool but not COLD. Suction line cool, but not COLD. After 30 minutes highway, it DID cool off better, but on a short trip this AM... same situation. Anyone have any ideas? Replies to this message: obyone (Jun 14, 2009 1:11 am) Mr_Shiftright (Jun 14, 2009 7:30 am)
#760 of 791 Re: Pressure differential question [rockindubya] by obyone Jun 14, 2009 (1:11 am)
Replying to: rockindubya (Jun 13, 2009 8:53 am) Did you evacuate the air in the system before loading the R134?
#761 of 791 Re: Pressure differential question [rockindubya] by Mr_Shiftright HOST Jun 14, 2009 (7:30 am)
Replying to: rockindubya (Jun 13, 2009 8:53 am) If you are using the gauges that come with the re-fill kit, they are generally not very accurate. DIY service on AC doesn't have a high rate of success.
#762 of 791 chevy silverado 2004 climate control by taprado Jun 23, 2009 (8:14 pm)
The A/C blows out of the defrost vent only even though I select the front vents. why is this happening
#763 of 791 Chevy Venture 2003 a/c problems HELP!!!911 by trachelle Jun 23, 2009 (8:23 pm)
Ok, hear goes.. I am not vehicle inclined at all. But I can give good discriptions on what is going on. My a/c was working great, then one day when I turned it to high #5 it would be off, then when I turned it to #1 it was high. They were VISSA VERSA Backwards( It has #s' Off & then 1-5) When I would turn it to off it would not turn off. Now around the 2nd or 3rd day, it all just stopped working. The light is lit wear it says air, and It is NOT blowing though. When I turn on differant #'s low to high I do not hear it change over, but when I turn the vents to come out on top, or the front vents, or the floor, I can hear the engine like change over.( Not sure if that is what I call it Sorry but like it wants to work, no loud noises regular noises) But get this, when I try to turn it to heat, the heat is NOT even coming on. This is strange, It was never ever making noices like a motor was going out or anything. I need air.. It is so hot. Thanks anyone who has any ideas..

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