Overheating problems with A/C on
08-12-2012, 01:18 AM
#94
I would try increasing the fan on fan off time on both fans. maybe try increasing the fan 1 minimum on time.
Maybe it's not running long enough to cool the gas in the condenser.
I believe the factory T stat is 190. Not sure what you are running but try running the factory settings I posted and adjust the temp slightly lower if you have a different T-stat.
Maybe it's not running long enough to cool the gas in the condenser.
I believe the factory T stat is 190. Not sure what you are running but try running the factory settings I posted and adjust the temp slightly lower if you have a different T-stat.
08-13-2012, 11:40 PM
#96
TECH Veteran
iTrader: (36)
Your pressures are dead on for the OAT. If you can verify it's the pop off valve opening. I'd call whoever you got the parts from and see about getting another compressor. It wouldn't be the first time I've ran across a weak valve.
I've seen those trucks come in the shop with completely plugged condensers from hay and bugs running 400+ on the head and never blow the pop off. At the pressures you are running you are normal and in the safe range. And here in hot as hell south texas we are in the same boat in the HVAC OAT temperature performance range that some of the other guys on here just aren't experiencing or seeing so it may seem high to them but it's dead normal for us.
Just one more time to clarify you have determined it is the pop off valve opening. You should be low on refrigerant and have refrigerant oil residue if this is the case after it blows multiple times.
I've seen those trucks come in the shop with completely plugged condensers from hay and bugs running 400+ on the head and never blow the pop off. At the pressures you are running you are normal and in the safe range. And here in hot as hell south texas we are in the same boat in the HVAC OAT temperature performance range that some of the other guys on here just aren't experiencing or seeing so it may seem high to them but it's dead normal for us.
Just one more time to clarify you have determined it is the pop off valve opening. You should be low on refrigerant and have refrigerant oil residue if this is the case after it blows multiple times.
08-13-2012, 11:49 PM
#97
Your pressures are dead on for the OAT. If you can verify it's the pop off valve opening. I'd call whoever you got the parts from and see about getting another compressor. It wouldn't be the first time I've ran across a weak valve.
I've seen those trucks come in the shop with completely plugged condensers from hay and bugs running 400+ on the head and never blow the pop off. At the pressures you are running you are normal and in the safe range. And here in hot as hell south texas we are in the same boat in the HVAC OAT temperature performance range that some of the other guys on here just aren't experiencing or seeing so it may seem high to them but it's dead normal for us.
Just one more time to clarify you have determined it is the pop off valve opening. You should be low on refrigerant and have refrigerant oil residue if this is the case after it blows multiple times.
I've seen those trucks come in the shop with completely plugged condensers from hay and bugs running 400+ on the head and never blow the pop off. At the pressures you are running you are normal and in the safe range. And here in hot as hell south texas we are in the same boat in the HVAC OAT temperature performance range that some of the other guys on here just aren't experiencing or seeing so it may seem high to them but it's dead normal for us.
Just one more time to clarify you have determined it is the pop off valve opening. You should be low on refrigerant and have refrigerant oil residue if this is the case after it blows multiple times.
08-14-2012, 06:39 PM
#98
So I got under the truck today and it looks clean up by the pop off valve. Also looks clean on the top of the compressor where the high/low inlets are. Hoses look clean. The only place I saw anything are on the bottom side of the compressor. Just a couple orange dots as you can see in the pic. Is this refrigerant? If so, it doesn't look like it is coming from the pop off valve
08-15-2012, 07:19 PM
#99
Okay guys I narrowed it down a little more today. The damn thing only makes noise when the compressor clutch engages. So when I take off from a stop light, the clutch releases and by the time I get into second or so, it reengages and then makes the pppssshhh sound. It does it everytime it engages. I confirmed this in the hpt scanner with the ac clutch status bit. Also you can tell by how cold the ac gets right after it makes the sound. So I don't know if it is refrigerant leaking out from somewhere when the compressor comes on or if the sound is the compressor clutch slipping.. What are your guys' thoughts?
