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Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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23,870 Posts
The compressor may be fine. You mght have seen a puff of refrigerant if the high side pressure got too high. There is a high pressure relief valve on the compressor that will exhaust excess pressure. It usually makes a horrible noise when this happens.
The reasons for excessive pressure are that either the radiator/cooling cooling fan is not working or the freon is overcharged. The radiator/condenser cooling fan isn't as critical when you are going down the road with air blowing through the condenser, but the fan is needed when the vehicle is at a stop. Also a restriction in the plumbing or over-oiling can cause this.
 

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Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
Joined
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23,870 Posts
We would need to know the high side and low side pressures to determine if the charge was sufficient or the high side was too high.
The safety valve should blow off around 350+ psi?
 
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