heater/AC problems
#1
heater/AC problems
so i just got my ac recharged about 2 weeks ago and now every time i use my ac or my heater my ac pump is constantly kicking on and off, the part i dont get is why is it kicking on and off when im using the HEATER. and not to mention it bogs my truck up and down. like every 5-10 seconds....any ideas is to why this is happening?
#3
#4
A/C cycling frequency is regulated by the low pressure cycling switch. Generally speaking, R134A systems like yours do tend to cycle more frequently than the old R12 systems. If the cycling is a lot more frequent than you remember on this vehicle, have the charge rechecked. It may be underfilled.
AC compressor operation allowed:
Max AC
AC
Vent/Floor
Floor/Defrost
Defrost
AC compressor operation not allowed:
Vent only
Floor only
Off
As shown above, A/C compressor logic is dictated by the mode switch position, not by the temperature selected on the dial. Beyond that, compressor clutch engagement can be disallowed by the Low Pressure Cycling switch, High Pressure Safety Switch or the PCM when in power mode.
AC compressor operation allowed:
Max AC
AC
Vent/Floor
Floor/Defrost
Defrost
AC compressor operation not allowed:
Vent only
Floor only
Off
As shown above, A/C compressor logic is dictated by the mode switch position, not by the temperature selected on the dial. Beyond that, compressor clutch engagement can be disallowed by the Low Pressure Cycling switch, High Pressure Safety Switch or the PCM when in power mode.
#5
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The_Dealer
2.3L & 2.5L I4 Tech
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11-01-2007 02:44 PM