A/C Hi-Lo Pressure switch.

[86 911 Targa]

^^^^^
Need the High/Low pressure cut-off data for this switch.

Could not find any P/N.

Thanks in advance,

Gerry

[Pazuzu]

Pull the switch apart.



No, really! The rubber part pulls off with the wires. It's a tight fit, pull hard. On the part of the switch that is exposed, it will show the high and low pressure cut off values.

Problem is, it's probably in metric, so it'll be something like 2 and 28 kg/cm^2. To convert to pounds per square inch, take the values and multiply by 14.22 (14 is good enough).

I have two switches on my workbench, both are on at 2 kg/cm^2 (basically 28 psi), while they turn off at 24 and 28 kg/cm^2 (336 and 392 psi).

[86 911 Targa]

Originally Posted by Pazuzu

Pull the switch apart.



No, really! The rubber part pulls off with the wires. It's a tight fit, pull hard. On the part of the switch that is exposed, it will show the high and low pressure cut off values.

Problem is, it's probably in metric, so it'll be something like 2 and 28 kg/cm^2. To convert to pounds per square inch, take the values and multiply by 14.22 (14 is good enough).

I have two switches on my workbench, both are on at 2 kg/cm^2 (basically 28 psi), while they turn off at 24 and 28 kg/cm^2 (336 and 392 psi).

So the switch shuts off the compressor at a 24 psi low side?

How about the high side?

Thanks,

Gerry

[Pazuzu]

Shuts it off when below about 28psi, and above about 350 psi. Allows it to run between those numbers.
So, it shuts it of if you lose all pressure, or if there is a blockage and you over pressurize the system.