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Old 08-18-2013, 10:44 PM   #1
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Workhorse Chassis Air Conditioner Refrigerant

I have a 2000 MY Fleetwood Flair Model 30H Class A Motorhome built on a Chevy/Workhorse P30 Chassis. I recently am having problems with the Chassis AC System. It isn't blowing cold like it used to. Since the coach is 13 years old, I wanted to start with the charge amount in the system and go from there. Problem is that I cannot seem to find a system charge level specification. The closest I see is info from Workhorse that says the system "starts" with a 1.5 Lb charge for the "Harrison" Condenser and Receiver Drier components and the full "System" charge level is the responsibility of the Coach Builder. Would anybody know how to get the "System" charge level specification? Any help would be greatly appreciated.

2000 Fleetwood Flair on 454 SPFI Workhorse Chassis
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Old 08-18-2013, 10:52 PM   #2
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Charge using the inlet and outlet temp comparison of the evap core..this will get you exact

96 Dynasty 36' that does NOT wander, thanks to RuppParts.com and their superior "poly" suspension bushings
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Old 08-19-2013, 04:43 AM   #3
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Use these numbers to determine full charge on your 134A system. For example if it is 90 degrees ambiant, then your pressures should be 45-55 psi on the low side and
250-270 psi on the high side.


Ambient Temp (˚F)
Low Side Gauge
High Side Gauge

25-35 psi
135-155 psi

35-40 psi
145-160 psi

35-45 psi
150-170 psi

40-50 psi
175-210 psi

45-55 psi
225-250 psi

45-55 psi
250-270 psi

50-55 psi
275-300 psi

50-55 psi
315-325 psi

50-55 psi
340-345 psi
06 Hurricane 34FT WH W20 Chassis 8.1L 132K, Steersafe, Koni Shocks, DIY Trac Bar, Tri-Metric 2025RV Battery Monitor, 4-6V Batteries, Scan Gauge 2, Crossfires, 735W Solar Morningstar MPPT-60, WG T4 In-Motion Sat, XM Radio, 07 Chevy Malibu Maxx Toad, Falcon 2, Brake Buddy, Escapee
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Old 08-19-2013, 07:33 AM   #4
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This is great info. I'll give it a look, Thank you!
2000 Fleetwood Flair on 454 SPFI Workhorse Chassis
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Old 08-20-2013, 07:49 AM   #5
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Refrigerant Amount

I was able to call Fleetwood in Decatur and they were able to provide the factory charge information to me. They said that the proper system charge is 2.0 Lbs R134a.
2000 Fleetwood Flair on 454 SPFI Workhorse Chassis
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air conditioner, chassis, workhorse

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