REPAIR SYSTEM 09
Heating & air conditioning.
A/C performance, leaks, compressors, condensers, blower motors and heater problems. In Tucson, A/C is not optional.
THE BASICS
How it works, and why it matters.
What it does
The A/C system pumps refrigerant through a compressor, condenser, expansion valve and evaporator to pull heat out of the cab. Blend doors and actuators mix hot and cold air, and the blower moves it. Heat comes from engine coolant through the heater core, so cooling-system problems can show up as heater problems.
Why it matters
A slow leak or a failing compressor clutch gets worse in the heat. Recharging without finding the leak just puts money into the air. Tucson summers make the A/C one of the hardest-working parts on the truck.
Warning signs
- Air not cold, or cold only while driving
- A/C cycling on and off
- Air coming out the wrong vents
- Blower working on some speeds only
- No heat, or a sweet smell in the cab
- Noise when the A/C turns on
What we check
- High- and low-side pressures
- Leak detection with dye or an electronic sniffer
- Compressor, clutch and condenser fan
- Blend doors and actuators
- Blower motor and resistor
Keep it healthy
- Run the A/C a few minutes every month, even in winter
- Keep the condenser clean
- Fix leaks before recharging