Attention A/C Experts

[stephenspann27]

It works!! Took a test drive the the compressor is cycling now like it should. Everything works great right now.. we'll see how long it last heh.. doubt I could be lucky enough for it not to have a leak.

 

[stephenspann27]

I think the expansion valve plays a role in cycling the compressor, I know it's a thermostatic valve.. so I assume it closes at a certain temperature. Not sure how this disengages the compressor, maybe there is a load limit on the compressor? anyone know? Or.. Maybe the expansion valve creates high pressure then the pressure switch kills the compressor? It's called a "low pressure switch" which leads me to believe it only checks for minimum pressure.

 

[westvirginia24976]

An expansion valve meters the refrigerant. It responds to the suction line temperature and feeds more or less refrigerant depending on the load. It does not directly control the compressor. You may have a cycling switch which senses the temperature of the evaporator and disengages when it gets too cold. The low pressure switch will also take it out and make it cycle if the low side gets too cold or reduced pressure due to low charge.

 

[stephenspann27]

good info. to hyjack the thread for a short while.

what is the amount of PAG required in the R134A system. my ac comp grenaded itself and i am replacing it along with the condesor (damaged a little) with junkyard units. i plan on cleaning out the condensor and hoses to ensure no debris. so, how much oil to add to a dry set up?

we now return to your regularly scheduled posting...

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