Quote:
Originally Posted by SD1too
Hello John,
Overfilling with refrigerant is the least likely reason for the lack of cooling. Your condenser may be inefficient due to corroded fins and/or the refrigerant gas may be leaking out through dry seals. The good news is that your compressor is engaging. I wouldn't worry too much about the noise at the moment. That can be the result of a low charge.
What you need to do is to use an air conditioning specialist, either with premises (rare these days) or a mobile self employed person. They will not just recharge the system but use everything at their disposal to check your system thoroughly. If you're anywhere near Colwyn Bay, forum member Jules offers air conditioning services and specialises in the 75/ZT.
Simon
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The overfilling of refrigerant can and will make the pump noisy it will do this until the system has to much pressure it cant cope and the trinary switch will then cut the power to the compressor, until the pressure drops then the compressor will cut back in during this the air con will feel warm, the non operation of the cooling fan will also give the same symptoms
simple test from cold start engine low pressure pipe will go cold as normal then start to get warm and high pressure pipe will get red hot if so to much gas or fan not working