Question about Cars & Trucks
Wow. try fill statements, first off is this R134?
my guess is this HVAC related (A/C clutch is only clue)
post the symptoms. after the system that fails,
hi, my A/C messed up. so I did this and that.
never hot wire the clutch, ever or risk wrecking the compressor and friends. never.
the car has AMP module that protects the Compressor.
we check the inputs to this module FIRST if clutch is 0volts./
FIRST, and find true cause. of failure.
there are 6 class fails.
1: one is too high pressure,
2: is too low pressure
3: evap iced up.
4: engine overload
6: blower is on.
those are facts or sensor fibbing.
any tech knows to do this fires. tests with the meter
then check why (more tests) with a meter to see why that sensor
is fibbing or NOT..
this is covered in ASE school
and if you read the FSM, HVAC chapter, that too.
i hope you dont burn up a good compressor.
btw 1: the Freon is put in by weight not volume or presssure.
and the amount can depend on if hoses and parts are still stock.
and by country , some countries use differ A/C
what a pro does is put in the miniumn load. then increase the
freon until the cooling hits max. (a thermometer shown in fsm)
the stops adding freon.
R134 hates overloads !!!!!
I do the electric side, but have school on loop side and seen all the bad stuff done there, (infinite)
ps. retired now.
Posted on Jun 15, 2014
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Posted on Jan 02, 2017
the control unit is no good.i had a similar situation with a 98 tracker,and installed a switch to give it a ground for the compressor relay that comes from the a/c computer module.
it works good and goes on and off with the a/c switch.
Posted on Jul 18, 2009
If the compressor is running and you have the same temp on both tubes the compressor is probably shot. You need to check the pressure on the high side too. It should be around 200.
When you replace the compressor, make sure you also replace the accumulator, orifice filter and flush out the evaporator and condenser. The only moving parts on the ac system is the compressor and often when it fails it will put small metal particles into the a/c system that will cause your new one to fail.
Hope this helps.
Posted on Aug 20, 2009
You were close! Most Fords have a CCRM (Continuous Control Relay Module) thats on the passenger side fenderwell. It has 4 relays: one for the AC compressor cluth, one for the fuel pump, and two for the electric fan (high- and low-speed.) The AC is the one that fails the most. You can replace the CCRM by removing the intake air filter box and working through the fenderwell openings. If it gets to difficult you must remove the wheel and splash cover to replace it from the wheel opening.
Posted on Sep 21, 2009
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