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Eurovan Air Conditioner High and Low Side Pressure

Michael Diehr All Messages By This Member #162569 Does anyone have a reference for the proper high and low side pressures for the Air Conditioner in a 2000 Eurovan? The system was flushed and replaced in 2017 (Compressor, expansion valve, receiver drier). The AC performance is great, and is quiet when it starts up, but it makes weird noises after running for a while. I just purchased a manifold gauge set and took some readings: Lo Hi Status ------------------------- 85 85 70F ambient, engine off 30 130 AC on, fan on speed 1 34 155 AC on, fan on speed 4 42 195 AC on, blocking grille with cardboard to reduce airflow Sources on the internet are saying the Low pressure is fine, but the High pressure might be a bit low, and this could suggest it's low on R134a, but I'm not sure I have the right pressures: I believe the Sanden 1214 compressor is a variable displacement compressor.
Wigen All Messages By This Member #162570 first find what noises are than don’t block off air to condenser? than put in a little 134 to bring high side pressure up
sam letzring All Messages By This Member #162571 I have the same noise problem- I "THINK" it might be the clutch. AC works great- haven't had to add freon in 19 years now- but it is getting very noisy. Sam 02 EVC toggle quoted message Show quoted text On 6/15/2021 6:03 PM, Michael Diehr wrote: Does anyone have a reference for the proper high and low side pressures for the Air Conditioner in a 2000 Eurovan? The system was flushed and replaced in 2017 (Compressor, expansion valve, receiver drier). The AC performance is great, and is quiet when it starts up, but it makes weird noises after running for a while. I just purchased a manifold gauge set and took some readings: Lo Hi Status ------------------------- 85 85 70F ambient, engine off 30 130 AC on, fan on speed 1 34 155 AC on, fan on speed 4 42 195 AC on, blocking grille with cardboard to reduce airflow Sources on the internet are saying the Low pressure is fine, but the High pressure might be a bit low, and this could suggest it's low on R134a, but I'm not sure I have the right pressures: I believe the Sanden 1214 compressor is a variable displacement compressor. .
Michael Diehr All Messages By This Member #162572 There's a long backstory on this - I'm the guy that has had 5 AC compressors installed... Details here: /g/eurovanupdate/topic/45983180#141663 In the past, the noises have either meant "imminent compressor failure" or "low on R134a", and I'm curious if there's a way to figure out which is which. toggle quoted message Show quoted text On Jun 15, 2021, at 3:34 PM, Wigen via groups.io <chenely63@...> wrote: first find what noises are than don’t block off air to condenser than put in a little 134 to bring high side pressure up

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