Can you run AC without high pressure switch?
The AC pressure switch is the part responsible for monitoring the pressure. When there is enough pressure for the compressor to run safely, if the AC pressure switch fails, the compressor will not receive a signal to start, and therefore, you will not have a running air conditioning in your vehicle.
How do you replace a low pressure switch?
- Step 1: Locate the A/C pressure switch.
- Step 1: Disconnect the negative battery cable.
- Step 2: Remove the switch electrical connector.
- Step 3: Remove the switch.
- Step 1: Install the new switch.
- Step 2: Reinstall the electrical connector.
- Step 3: Reinstall the negative battery cable.
- Step 4: Test the A/C.
When to use high or low pressure switch?
The high-pressure switch is designed to shut down the compressor if the line pressure gets dangerously high. This will usually happen when a condenser fan fails. The low-pressure switch is designed to shut the compressor down if the pressure becomes to low or the evaporator freezes.
What does the low pressure switch on a Chevy do?
The low-pressure switch is designed to shut the compressor down if the pressure becomes to low or the evaporator freezes. The oil for the compressor is suspended in the Freon, and if a leak in the system occurs, the oil, being heavier than the Freon, will be the first thing to leak out.
What’s the best way to adjust a pressure switch?
If all the systems look good, then try to recalibrated/adjust the pressure switch using the adjustment wheel at the bottom of the switch. This little black, jagged thumbwheel helps to fine tune the pressure switch sensitivity and is best done with help from an ohmmeter.
Where is the low side air conditioning switch?
The low-side switch will be located on the largest diameter air conditioning line or on the side of the accumulator (round container) on the passenger side firewall. Unplug the switch by squeezing the fitting and pulling it straight out. Remove the switch using the appropriate size wrench.