Dash a/c recharge 2002 Diplomat

[Mutt]

I need to add some freon oil mix since the dash air is blowing warm air. Where is the best location to add some freon? On the compressor or at the condenser? Thanks , David

[bluepill]

You can add it to the low side fitting with the engine running under these conditions:

Ambient temperature is 70 degrees or above.

You open the valve on the manifold gauge slowly and only partially.

You feed only vapor from your can (Can valve UP)

[guber]

my 98 windsor has service valves in the front of the coach

[Mutt]

Thanks. I forgot about the front. There is a service port there. When the temperature gets to 70+ I will add a can or two and see if it will start to blow cool air. These dash air units can't do much when it gets hot weather. Thanks David.

[walt2137]

Mutt you can use a pan of hot water when it's cold to fill the air but you won't need it this time of the year in GA

[Old Scout]

Curious -- a lot of older coaches [mine included] use mechanical wax valves to regulate/control engine fan, vs the electronic control on newer coaches. As a result, there is no dash A/C interface to the fan controller on many of these older coaches. Adding after-market cooling fans to the A/C condenser, with a relay to the compressor clutch switch, will significantly improve dash A/C cooling and help prevent freon [134a] over-pressure and premature compressor failure.

[walt2137]

Yes on our 2000 Dyn with the wax valve I have to use a shop fan to cool the AC condenser to fill the system and keep the temp down , some of the older Dyn came with a 12 volt condenser fan like the Diplomats have thar workers great.