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alvinator · 08-28-2008, 02:50 PM

We recently purchased a 2003 Kountry Star gasser with the 8.1 Chevy. Our dash air does not seem real cold. Does anyone have an idea what the outlet temperature should be?

alvinator · 08-28-2008, 02:50 PM

We recently purchased a 2003 Kountry Star gasser with the 8.1 Chevy. Our dash air does not seem real cold. Does anyone have an idea what the outlet temperature should be?

cannon man · 08-28-2008, 04:10 PM

go to workhorse forum and do search for AC. good luck. i've had two. could'nt get em to work very well.

imgoin4it · 08-28-2008, 04:27 PM

If you stick a thermometer into the duct outlet it should get very close to 40 degrees. Or if on a very hot day, ie above 80 degrees, it should get to about one half the outside temperature.

Latitude · 08-28-2008, 04:36 PM

Alvin

If it is blowing a 'Little' bit cool it likely is not the Condenser.

Likely a leak, Low on Freon or 2003 whatever they were using then.OR a Compressor.

I think Compressor

Rick

TXiceman · 08-28-2008, 05:52 PM

Realistically on a hot day, you should be able to get about 50 dF in the outlet of the evaporator (inside coil). To check this, put the A/C on with the fan on high and recirculated mode, hold the engine speed at a high idle, about 1200 to 1500 RPM.

If you are running 40 dF, you are very close to freezing the coil if you are not.

Lots of places sell the R-134a kits with a gauge an minimal instructions that will probably get you going if it is a leak. A bad expansion device or compressor is a bit harder to diagnose.

Oh, the condenser is the part that is mounted out side the vehicle in front of the radiator.

Ken

steevo · 08-29-2008, 02:43 AM

A/C systems will/should reduce ambient temp 20-25 degrees...this means if it is 90 outside the temperature of the air coming out of the vent in your unit should be 65-70 degrees. If you turn the control to "Max A/C" it will draw air from within your unit (instead of from the outside)....so that as the air cools down in the car/RV and is cycled through the A/C system again it will again be reduced by 20-25 degrees.
Hope this helps

Lug_Nut · 08-29-2008, 02:48 AM

My dash air works well about 50% of the time. The other half of the time it blows warm, or at least, not cool air. It will be addressed at Newmar on the 6 and 7th of October. I will post their findings.

Peter

RVDude · 08-29-2008, 09:18 AM

All A/C units should be able to pull about 30F reduction from ambient bottoming out around 45-50F. Intermittent ability to pull this temp delta suggests expansion valve problem - either a mechanical issue internal to the valve or maybe just excess condensation dripping on the expansion valve temp bulb or the bulb is loose from the evaporator. Consistent insufficient cooling suggests low refrigerant levels or low pressures (compressor leakage). No cooling can be many things. Excess cooling suggest defect in expansion valve too.

TXiceman · 08-29-2008, 08:03 PM

Steevo, the 18 to 20 dF air temp difference is between the air into the unit vs. the air out of the unit. It does not equate to the outdoor temperature except...hotter means more load on the A/C.

A dash air will generally run closer to 30 dF difference and should be about 50 dF out let when working properly. It may get down to 45, but should be no lower unless you need ice cubes.

Almost 40 years in the industrial refrigeration field and more A/C work than I like and I do see a lot of urban myths on A/C units.

ken