Aircon fault finding

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Thanks but will the clutch even engage if there is not enough pressure at the pressure switch located on the drier?
I also thought that I should be able to see air bubbles in the sight glass on the drier if the gas was low?
I'd like to rule anything else out first as I think it could be pricey to sort the gas out as it runs on the old R12 stuff. I can't find any of this gas online and it looks like it's a case of replacing the drier if I change to the new gas.
I would say the air I'm getting isn't any colder than ambient. I would think if the gas was low but not low enough to activate the pressure switch and prevent the compressor from engaging I'd at least be getting air a little colder than ambient?
If there's a relatively inexpensive way to refill I'll give that a go first but at the moment I can't find any R12. I don't know if it could be a blocked hose from the compressor to the condenser. Does anyone know if the hot pipe from the compressor should feel just warm at the condenser end?
 
Thanks but will the clutch even engage if there is not enough pressure at the pressure switch located on the drier?
I also thought that I should be able to see air bubbles in the sight glass on the drier if the gas was low?
I'd like to rule anything else out first as I think it could be pricey to sort the gas out as it runs on the old R12 stuff. I can't find any of this gas online and it looks like it's a case of replacing the drier if I change to the new gas.
I would say the air I'm getting isn't any colder than ambient. I would think if the gas was low but not low enough to activate the pressure switch and prevent the compressor from engaging I'd at least be getting air a little colder than ambient?
If there's a relatively inexpensive way to refill I'll give that a go first but at the moment I can't find any R12. I don't know if it could be a blocked hose from the compressor to the condenser. Does anyone know if the hot pipe from the compressor should feel just warm at the condenser end?
No gas, the compressor clutch will not engage, low gas it may well engage but not cool very much. Loss of gas is common, some cars have a recomendation of a refill every 3 years.
 
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