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Automotive HVAC Forum

Professional automotive forum for discussion of heating, ventilation, and air conditioning maintenance and repairs. Includes discussion of refrigerants, refrigeration lubricants, system analysis and diagnostics, filtration, HVAC-specific tools & equipment, best practices, and more. This forum is for experienced automotive repair professionals only, membership required.

Continue to the description of our next automotive discussion forum, the Technical Discussion Forum.

Recent Automotive Discussions in the Automotive HVAC Forum

1234yf kilograms how do you sell it?
02/14/2019 in the HVAC Forum
our Robinair 1234yf machine measures refrigerant in kilograms, one kg is over 35 oz, most new cars hold less than a kilogram so the amount used to charge is in fraction of a kg, searching for a way to price 1234yf in our POS system that everyone will unde...
CAT 740 DUMP TRUCK high pressures
02/04/2019 in the HVAC Forum
CAT 740 DUMP TRUCK. Complaint a/c not cold after 3-4 hours of operation, system is a orifice tube type which is part of the dryer, and also has a accumulator on suction side. Ambient temp 30 degrees Celsius, humidity 58%. Static pressure the low side gaug...
expansion valve
12/20/2018 in the HVAC Forum
[HVAC: 12 Toyota Tundra 5.7L] Hoping someone with some vehicle specific knowledge can help me out. Have the mentioned toyota. I need to replace the expansion valve. Alldata calls for 4.0 hours for expansion valve but shows no procedure. Shows almost 8 ho...
Best a/c machine 'in your opinion'
12/20/2018 in the HVAC Forum
Hi everyone, Im looking to replace my 12 yo RTI 134a unit (still works, getting tired) as well as buy a 1234yf machine. Can you share your hi's and low's of the equipment you use. I am looking for quality and simplicity Thanks Trevor.

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