Just to remove any doubts, I'm the dummy!
Am I correct that if gas pressure is low, then the evaporator temperature will be too low, leading to icing up of the evaporator?
Have just purchased a set of gauges - not planning to do my own regassing, more to satisfy my curiosity. I'm using the table from this page to interpret the readings I get: AC Pressure Chart | R-134a Temperature Pressure Chart
The aircon in my 605 works, but it is not very cold - in fact it is Ok when outside temp is below 30C, but pretty hopeless above 30C. Definitely not icing up! The gauges tell me that the gas pressure is low - 150/25psi (at outside temp of 32C). OTOH, my Xantia has pressures around 220/25psi, and works normally.
Can anyone suggest what might be wrong? Cooling fans both work normally, condenser cooling fins don't look blocked (engine runs at normal temp on very hot days, so cooling system seems fine). Also, the input (?) pipe to the compressor, which is cold in the Xantia, is luke-warm (output pipe gets very hot).
Cheers
Alec
Am I correct that if gas pressure is low, then the evaporator temperature will be too low, leading to icing up of the evaporator?
Have just purchased a set of gauges - not planning to do my own regassing, more to satisfy my curiosity. I'm using the table from this page to interpret the readings I get: AC Pressure Chart | R-134a Temperature Pressure Chart
The aircon in my 605 works, but it is not very cold - in fact it is Ok when outside temp is below 30C, but pretty hopeless above 30C. Definitely not icing up! The gauges tell me that the gas pressure is low - 150/25psi (at outside temp of 32C). OTOH, my Xantia has pressures around 220/25psi, and works normally.
Can anyone suggest what might be wrong? Cooling fans both work normally, condenser cooling fins don't look blocked (engine runs at normal temp on very hot days, so cooling system seems fine). Also, the input (?) pipe to the compressor, which is cold in the Xantia, is luke-warm (output pipe gets very hot).
Cheers
Alec