college test not working

[leec007]

it is a domestic fridge,i have the right amount of refrigerent in the the system and its not cooling.i have 7 bar on the high side and i have just below 0 bar on the suction.most people in the class have 7 bar on the high side and there fridge is fine.the suction pipe feels cold going into the compressor and the discharge is warm going into the compressor.any ideas

[nike123]

Do you know anything about superheat and subcooling?

[leec007]

i don't know much about superheat or subcooling

[Brian_UK]

Then do some reading quickly because it will enable you to do some fault finding and to understand the system operation a little better.

Also, telling us a pressure is meaningless. It's like me saying that I have a green car, what make is it?

We need to know the refrigerant type, liquid temperature, superheat, subcooling, etc.

[nike123]

i don't know much about superheat or subcooling

Than do search on this forum for that terms and read threads on that subject as much as you can.
Also, I recommend Gary's books and this book.

[pwestuk]

Currently at college myself so here come what may be a couple of daft questions.

When you switch off the fridge does the gas pressure equalise and does it take a long time to do this?

Have you made sure that heat exchange surfaces are clean and clear?