Dash AC not cold
I'm wondering if my expectations for my Dash AC are set too high. It just doesn't seem to blow very cold. When it is about 85 out it comes out about 63 out of the dash with an AC temperature gauge. I ...
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1. YOU NEVER ADD OIL TO A SYSTEM. PERIOD
2. You only add any oil if you have had a catastrophic 134a coolant leak that blows out some oil.
3. As you probably know you have 134a not Freon.
4. To correctly test a Diesel motorhome Dash AC you must drive at 60 mph with the system on Max AC with a digital thermometer in one of the Passenger side AC outlet vents.
5. Also, you need to make sure the Condensor Fan IS running which it probably is since you get that 63 degree air.
6. Your year model holds 4.0 lbs of 134a.
7. Your BEST bet at this point is to remove the existing 134a and then install 4.0 lbs 134a, as you CANNOT be sure of the current charge
8. TOO MUCH 134a will cause cooling loss just as much as to little
9. At temps 95 or below at hiway speed, you best output will be in the 50 to 55 degree range.
10. To eliminate a possible hot water coolant valve leak take needle nose vise grips and clamp off the 2 coolant lines going to the Heater core. Note the best possible low temp after installing the correct amount of 134a and then see if that temp goes UP after removing the vise grips. Doug
2. You only add any oil if you have had a catastrophic 134a coolant leak that blows out some oil.
3. As you probably know you have 134a not Freon.
4. To correctly test a Diesel motorhome Dash AC you must drive at 60 mph with the system on Max AC with a digital thermometer in one of the Passenger side AC outlet vents.
5. Also, you need to make sure the Condensor Fan IS running which it probably is since you get that 63 degree air.
6. Your year model holds 4.0 lbs of 134a.
7. Your BEST bet at this point is to remove the existing 134a and then install 4.0 lbs 134a, as you CANNOT be sure of the current charge
8. TOO MUCH 134a will cause cooling loss just as much as to little
9. At temps 95 or below at hiway speed, you best output will be in the 50 to 55 degree range.
10. To eliminate a possible hot water coolant valve leak take needle nose vise grips and clamp off the 2 coolant lines going to the Heater core. Note the best possible low temp after installing the correct amount of 134a and then see if that temp goes UP after removing the vise grips. Doug
