Afternoon all,

I have a small enquiry,

Was at a site, working on a walkin freezer to find that the compressor had failed due to the electric being burth out.

On the expansion valve it had R134A but on the condensing unit it had R409A (FX56), Now am unsure of what gas it will and the fact that one runs mineral oil and the other runs polyester oil.

Only suggestion i can come up with was to take a sample from the oil and sent it away but this takes 1-2 weeks.

Has any1 got any other suggestions??