Low Pressure A/c Switch Question

[97whitez71]

On my '97, if I unscrew the low pressure switch from the accumulator/dryer, the compressor still runs. Is this supposed to work like that? I'm having trouble with my compressor continually running and decided to test it with the low pressure switch disconnected from the accumulator/dryer. I'm on my second low pressure switch. When I had the system worked on two summers ago, they put a dye in it and I'm wondering if that dye is clogging the low pressure switch. Any insight is appreciated. Thanks!

[dlewis1111]

On my '97, if I unscrew the low pressure switch from the accumulator/dryer, the compressor still runs. Is this supposed to work like that? I'm having trouble with my compressor continually running and decided to test it with the low pressure switch disconnected from the accumulator/dryer. I'm on my second low pressure switch. When I had the system worked on two summers ago, they put a dye in it and I'm wondering if that dye is clogging the low pressure switch. Any insight is appreciated. Thanks!

 

Doesn't unscrewing that switch create a large freon leak?

[txab]

On my '97, if I unscrew the low pressure switch from the accumulator/dryer, the compressor still runs. Is this supposed to work like that? I'm having trouble with my compressor continually running and decided to test it with the low pressure switch disconnected from the accumulator/dryer. I'm on my second low pressure switch. When I had the system worked on two summers ago, they put a dye in it and I'm wondering if that dye is clogging the low pressure switch. Any insight is appreciated. Thanks!

 

Doesn't unscrewing that switch create a large freon leak?

 

No there is a valve in the accumulator.

 

Dye will not cause a plug. If you have ever added a leak stop additive or 134a with a leak stop in it, that can cause plugs or blockages.

 

If you unplug the connector from the LPCO, does the compressor then shut off?

[dlewis1111]

On my '97, if I unscrew the low pressure switch from the accumulator/dryer, the compressor still runs. Is this supposed to work like that? I'm having trouble with my compressor continually running and decided to test it with the low pressure switch disconnected from the accumulator/dryer. I'm on my second low pressure switch. When I had the system worked on two summers ago, they put a dye in it and I'm wondering if that dye is clogging the low pressure switch. Any insight is appreciated. Thanks!

 

Doesn't unscrewing that switch create a large freon leak?

 

No there is a valve in the accumulator.

 

Dye will not cause a plug. If you have ever added a leak stop additive or 134a with a leak stop in it, that can cause plugs or blockages.

 

If you unplug the connector from the LPCO, does the compressor then shut off?

 

 

A valve, huh? They are getting fancy. My old R-12 system never had a valve to stop the flow. Must be the EPA forcing them to do that. haha

[txab]

Sounds like someone removed yours or it was stuck open. On the old R-12 it was a regular schrader type valve

[97whitez71]

 

If you unplug the connector from the LPCO, does the compressor then shut off?

 

 

Yes. The only time the compressor will cut off is when I unplug the electrical connection from the LPCO. Doesn't matter if the LPCO is connected to the accumulator/dryer or not. That's why I assume the LPCO is bad, but I don't understand what is causing them to go bad. Is my assumption correct?