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Toyota hiace AC compressor very hot.

Tiny
DEVIABSALOM
  • MEMBER
  • 2011 TOYOTA VAN
  • 4 CYL
  • 2WD
  • MANUAL
  • 10,455 MILES
Though the ac system is cooling, the ac compressor pump is very hot!What can cause this?The magnetic clutch is new!The technician has removed the ac compressor, cooler condenser and the cooler evaporator and serviced !The ac pump is still getting very hot!
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Friday, January 31st, 2014 AT 7:01 AM

12 Replies

Tiny
MLDANIELS2000
  • MECHANIC
  • 227 POSTS
Lack of oil in system, but by nature it will get hot because it is compressing refrigerant gas which heats up under compression.
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Friday, January 31st, 2014 AT 7:04 AM
Tiny
MLDANIELS2000
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What are the system pressures when running and the outside ambient air temperature?
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Friday, January 31st, 2014 AT 7:05 AM
Tiny
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The compressor should be hot when system works but should it be extremely hot?The oil was topped up!
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Friday, January 31st, 2014 AT 7:16 AM
Tiny
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He used 20g Ac oil and 450g R134a gas!System was Serviced using an Ac 930 air conditioning service unit.
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Friday, January 31st, 2014 AT 7:21 AM
Tiny
MLDANIELS2000
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How much oil was added?
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Friday, January 31st, 2014 AT 7:21 AM
Tiny
DEVIABSALOM
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20g and 450g r134a cooler refrigirant gas
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Friday, January 31st, 2014 AT 7:29 AM
Tiny
MLDANIELS2000
  • MECHANIC
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Next point is to check pressures then.
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Friday, January 31st, 2014 AT 3:54 PM
Tiny
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What are the recommended pressure for the system to be considered perfectly in good working Oder?What can cause pressure not to be on the correct levels as required and can this be the cause of the cooler compressor pump becoming extremely hot?The cooler compressor pump is in good condition.
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Friday, January 31st, 2014 AT 5:10 PM
Tiny
MLDANIELS2000
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Low side 26-34 psi high side 250-275 psi
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Friday, January 31st, 2014 AT 7:42 PM
Tiny
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Low pressure side -34psi and High pressure side-170psi. These are the readings on the pressure test as undertaken by the technician!
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Saturday, February 1st, 2014 AT 1:28 AM
Tiny
MLDANIELS2000
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Then it should be good. Is the system shutting it down on its own and not cooling?
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Saturday, February 1st, 2014 AT 2:10 PM
Tiny
MLDANIELS2000
  • MECHANIC
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Plus my earlier post of pressures had a typo. 150- 175 psi high. Yours is within specs.
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Saturday, February 1st, 2014 AT 2:11 PM

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