compressor clutch motor engages/disengages every 20 seconds

[mina_nuka]

From jick on another forum







The duty cycle of the a/c clutch is subjective with the following factors considered:
Refrigerant pressure in the system,
Ambient temperature,
Cabin temperature,
Coolant temperature,
Control setting,
Throttle position sensor signal,
Sun load sensor signal,
Engine rpm.



There is no particular pattern unless your system is that of the old non-climate control system that relies on the a/c amplifier, or the pressure switch of the CCOT (cycling clutch orifice tube) type.


Climate control is a more precise localized temperature targeting.
In hybrids and electric cars, you dont have a compressor clutch and therefore you shouldnt be able to hear a clutch-like click on engagement

[dr. d]

always so formal, jick is.

[dnomyar]

i just adjust the temp setting to the cooler temp.
in a non-defective system, this usually results in less of that engage-disengage clicking.
in a defective system, it won't change.

i guess you're right. I increase the thermostat switch to higher setting about 3/4 turn of the knob and the fan at no. 2 and yes the interval changed. the compressor clutch is disengaged at a longer time and engaged at a shorter time. thanks for the inputs.

[dnomyar]

From jick on another forum







The duty cycle of the a/c clutch is subjective with the following factors considered:
Refrigerant pressure in the system,
Ambient temperature,
Cabin temperature,
Coolant temperature,
Control setting,
Throttle position sensor signal,

Sun load sensor signal,
Engine rpm.



There is no particular pattern unless your system is that of the old non-climate control system that relies on the a/c amplifier, or the pressure switch of the CCOT (cycling clutch orifice tube) type.




Climate control is a more precise localized temperature targeting.
In hybrids and electric cars, you dont have a compressor clutch and therefore you shouldnt be able to hear a clutch-like click on engagement

thank you for the comprehensive explanation.... i guess it was just much ado about nothing on my part.