Air Conditioning

wengerdr · March 15, 2007

I have 93,000 on my 01 silverado and want to know if i should have my ac recharged before summer. It seems to be working fine but I dont want to run it dry and mess up something (don't know if that is even possible). I live in ohio, so only gets used half of the year. Can anyone give me some advise?

Indy · March 15, 2007

I have 93,000 on my 01 silverado and want to know if i should have my ac recharged before summer. It seems to be working fine but I dont want to run it dry and mess up something (don't know if that is even possible). I live in ohio, so only gets used half of the year. Can anyone give me some advise?

It actually gets used in the winter too, whenever you turn the heater control to defrost. It turns on to remove humidity from the air. You can have it checked to see if any recharging is required. I have a '99 with over 100,000 miles and it has never been done and works great.

wengerdr · March 16, 2007

Mine seems to be working good too. I just don't want to ruin anything by neglecting it until its too late. Can I let it go until the first sign of not cooling anymore?

BowTieDude · March 16, 2007

Mine seems to be working good too. I just don't want to ruin anything by neglecting it until its too late. Can I let it go until the first sign of not cooling anymore?

All late model vehicles have low/high pressure switches that will detect a low refrigerant level and cause the compressor to fast cycle when the refrigerant is getting low and when all is gone will keep the comp off all the time. You won't hurt it running it until it stops performing satisfactorily, if it still cools well you're good to go. This was not true of many older (70s-80s) cars and trucks. They would engage with nothing in them...

wengerdr · March 17, 2007

Thats what I wanted to know. Thank you much...

ken1mod · March 18, 2007

If it is cold, do not mess with it. If it ain't broke don't fix it. Don't look for trouble where none exists. These systems are awfully good.

Ken

eric232323 · March 18, 2007

If it is cold, do not mess with it. If it ain't broke don't fix it. Don't look for trouble where none exists. These systems are awfully good.

Ken

I have a 2003 gmc sierra and I have been getting warmer air over the past couple of days. I am going to recharge the system using Mac 134 measure and charge. Can anybody tell me which of my ports is my low port. There are two ports and I cannot figure out which one to use. The is one running from the condensor line with teh screw cap on the top and then another about 5 inches from it (Same black cap). I think the second one is the low port but I wanna be sure before I do this. Thanks Eric Martin

bartlanz · March 18, 2007

They should be different sizes, and the stuff should only hook up to one or the other, not both. IF that doesn't work for you, run the system, and the side that isn't cold is your low pressure side, or the side that gets hot... or the side that doesn't have the condenser... all of these SHOULD be the same side.

Condenser = condensing = high pressure

bartlanz · March 18, 2007

sry computer freaked and got a double post by mistake, wish they had the delete function turned on.

bradpell8 · March 18, 2007

I have 93,000 on my 01 silverado and want to know if i should have my ac recharged before summer. It seems to be working fine but I dont want to run it dry and mess up something (don't know if that is even possible). I live in ohio, so only gets used half of the year. Can anyone give me some advise?

it wont get messed up there is a low pressure sensor in the system to shut the clutch off when it is low.

bradpell8 · March 18, 2007

If it is cold, do not mess with it. If it ain't broke don't fix it. Don't look for trouble where none exists. These systems are awfully good.

Ken

I have a 2003 gmc sierra and I have been getting warmer air over the past couple of days. I am going to recharge the system using Mac 134 measure and charge. Can anybody tell me which of my ports is my low port. There are two ports and I cannot figure out which one to use. The is one running from the condensor line with teh screw cap on the top and then another about 5 inches from it (Same black cap). I think the second one is the low port but I wanna be sure before I do this. Thanks Eric Martin

I belive there is only one port and you may have to hook it up on the high side and runtruck with ac on high and let the compressor suck the refrigerant in.

eric232323 · March 18, 2007

If it is cold, do not mess with it. If it ain't broke don't fix it. Don't look for trouble where none exists. These systems are awfully good.

Ken

I have a 2003 gmc sierra and I have been getting warmer air over the past couple of days. I am going to recharge the system using Mac 134 measure and charge. Can anybody tell me which of my ports is my low port. There are two ports and I cannot figure out which one to use. The is one running from the condensor line with teh screw cap on the top and then another about 5 inches from it (Same black cap). I think the second one is the low port but I wanna be sure before I do this. Thanks Eric Martin

I belive there is only one port and you may have to hook it up on the high side and runtruck with ac on high and let the compressor suck the refrigerant in.

That is exactly what I did. The low port would no fit the refrigerant nozzle so I hooked it up to the high port which it fit perfectly. The guage showed that the refrigerant level was normal and was about midways in the normal range. Common sense told me that it had to be the freon level though because nothing else could be found wrong. The truck is kept very clean and up to date. It took about a quarter of a can continuing to stay in the normal range. The air conditioner is cold as hell now and I love this stuff because it also contains oil, conditioners, and stop leak so if there was a leak it will surely seal it up now. Thanks for all input and happy trucking to all.

ZZ327 · March 19, 2007

If it is cold, do not mess with it. If it ain't broke don't fix it. Don't look for trouble where none exists. These systems are awfully good.

Ken

I have a 2003 gmc sierra and I have been getting warmer air over the past couple of days. I am going to recharge the system using Mac 134 measure and charge. Can anybody tell me which of my ports is my low port. There are two ports and I cannot figure out which one to use. The is one running from the condensor line with teh screw cap on the top and then another about 5 inches from it (Same black cap). I think the second one is the low port but I wanna be sure before I do this. Thanks Eric Martin

I belive there is only one port and you may have to hook it up on the high side and runtruck with ac on high and let the compressor suck the refrigerant in.

That is exactly what I did. The low port would no fit the refrigerant nozzle so I hooked it up to the high port which it fit perfectly. The guage showed that the refrigerant level was normal and was about midways in the normal range. Common sense told me that it had to be the freon level though because nothing else could be found wrong. The truck is kept very clean and up to date. It took about a quarter of a can continuing to stay in the normal range. The air conditioner is cold as hell now and I love this stuff because it also contains oil, conditioners, and stop leak so if there was a leak it will surely seal it up now. Thanks for all input and happy trucking to all.

the quage only fits on the larger stub (low port) You connected to the low port. When charging run you AC on high and charge to 45-48PSI RUNNING pressure.

az'03Silverado · March 19, 2007

Even if the A/C never gets used, summer or winter, it's always under pressure and can develop a leak. I had a '98 S-10 that I only used the A/C during the summer and it developed a leak somewhere in the wintertime (in AZ you never need the defrost) and I didn't find out until the summer. For 3 years I just knew that every summer I'd need to recharge the A/C.