A/C compressor kicking on every 5 seconds.
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New User
Joined: Jun 2004
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From: Beachwood, NJ
A/C compressor kicking on every 5 seconds.
Hello all. I started having this problem after I had to disconnect a/c compresseor from its bracket to replace my timing belt. I removed the compressor from its bracket but not any of the lines. I did have to kind of push it back out of the way though. Could this have led to my problem?
The compressor kicks on every 5 seconds and bogs the motor down. It stops, of course, when I switch the vent **** to the off position. But it starts again as soon as I switch the **** to the heat, vent, or the a/c. BTW, I am refering to my 1997 Ranger Supercab w/ 2.3 5sp. Thanks for any help.
The compressor kicks on every 5 seconds and bogs the motor down. It stops, of course, when I switch the vent **** to the off position. But it starts again as soon as I switch the **** to the heat, vent, or the a/c. BTW, I am refering to my 1997 Ranger Supercab w/ 2.3 5sp. Thanks for any help.
Last edited by SnoMan97; Jun 17, 2004 at 09:29 AM.
Junior User
Joined: Jun 2004
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Look carefully. I can almost guarantee you have kinked one of the hose or tube portions of of the a/c freon lines when you "pushed things back a bit". Modern integrated HVAC systems run the A/C compressor even in heat mode, to dehumidify air. So your compressor is trying to run, as normal, in the A/C, heat, and blended modes.
The overwhelming odds are that a kinked line is creating the following situation: Your A/C compressor is coming on, quickly building to overpressure due to a kinked line, then cycling off via the A/C line overpressure safety switch cutting electrical power to the A/C clutch (rather than the clutch turning off normally via the thermostat cutting its electrical power), then coming back on as soon as the safety valve sees a lower pressure. It would also explain the running of the A/C compressor bogging down your engine, since the compressor is running against a higher than normal pressure load - until the overpressure safety switch is tripped and the cycle starts over.
The overwhelming odds are that a kinked line is creating the following situation: Your A/C compressor is coming on, quickly building to overpressure due to a kinked line, then cycling off via the A/C line overpressure safety switch cutting electrical power to the A/C clutch (rather than the clutch turning off normally via the thermostat cutting its electrical power), then coming back on as soon as the safety valve sees a lower pressure. It would also explain the running of the A/C compressor bogging down your engine, since the compressor is running against a higher than normal pressure load - until the overpressure safety switch is tripped and the cycle starts over.
Freshman User
Joined: May 2004
Posts: 29
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From: Madison, WI
I had a similar problem with my 95 Ford Escort. It turned out that the R-134 was a little low. I topped it off, and it cured the problem. Low refrigerant will cause the over-pressure cycle described above, which will cause your system to cycle on and off.
The only caution I would give is that it might be worthwhile to get the system leak tested. When you pushed it out of the way, you might have created a leak.
The only caution I would give is that it might be worthwhile to get the system leak tested. When you pushed it out of the way, you might have created a leak.
Junior User
Joined: Jun 2004
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F250FREAK is exactly correct. Modern A/C systems have a low pressure cutoff switch in addition to the overpressure switch. Could you have possibly turned one of the fittings on the lines slightly, causing a small leak?
