Tech Tips

BLOWER MOTOR

CP411

Blower Motor Speeds

CABIN AIR FILTER

CP353

Cabin Air Filters

COMPRESSOR/CLUTCH

CP302

Compressor Sludge (GOO)

CP303

Rapid Multiple Compressor Clutch Bearing Failures

CP328

Compressor Failures

CP336

Compressor Clutch Coil Diagnosis

CP339

Shaft Seal Lubrication

CP398

Clutch Coil Voltage Identification

CP403

Compressor Oil Slugging

CONDENSER

CP362

Condenser Comparison

ELECTRICAL

CP322

Understanding Wiring Diagrams

CP323

Mr. Relay

CP334

Basic Electrical Testing

CP337

Pressure Transducer Quick Test

CP416

Ohm’s Law

ENGINE FAN

CP304

Thermal Fan Clutch Diagnosis

CP357

Fan Clutch Rotation

EVAPORATOR

CP351

Evaporator Leak Tests

EXPANSION VALVE

CP321

Why Inspect the TXV?

CP352

Why Clean or Change the Expansion Valve When Replacing a Compressor?

GENERAL

CP327

Works in the Winter

CP329

Insufficient Airflow from Dash

CP348

Restricted Discharge Line

CP369

What Role Does Humidity Play?

HEATING SYSTEM

CP311

Heater Core Failures

CP331

Heater Core Failures and Replacement

CP361

Heater Hose Replacement

CP381

Insufficient Heating in Winter

CP408

Electronically Controlled Heater Valves

RECEIVER DRIER/ACCUMULATOR

CP340

Why R&R the Accumulator or Receiver-Drier

SERVICE

CP326

Charging with Cans, Guess Again?

CP355

Temperature Testing Methods

CP372

Vacuum Terminology

CP406

The Downside to Dye Leak Detection

CHEVROLET/GMC

CP312

1988-1994 C/K Trucks: Flashing A/C Switch LED

CP316

Solving Mystery Noise from a GM Compressor

CP368

GM Truck High Pressure Condition

CP417

Testing 1988 – 1993 GM C,K Series Blend Air Motors

FORD

CP356

Diagnosing Ford’s Electronic Blend Door Actuator for Manual Air Conditioning/Heating

CP418

Ford Erratic or Insufficient Temperature

Compressor Sludge (GOO)
Rapid Multiple Compressor Clutch Bearing Failures
Thermal Fan Clutch Diagnosis
Heater Core Failures
1988-1994 C/K Trucks: Flashing A/C Switch LED
Solving Mystery Noise from a GM Compressor
Why Inspect the TXV?
Understanding Wiring Diagrams
Mr. Relay
Charging with Cans, Guess Again?
Works in the Winter
Compressor Failures
Insufficient Airflow from Dash
Heater Core Failures and Replacement
Basic Electrical Testing
Compressor Clutch Coil Diagnosis
Pressure Transducer Quick Test
Shaft Seal Lubrication
Why R&R the Accumulator or Receiver-Drier
Restricted Discharge Line
Evaporator Leak Tests
Why Clean or Change the Expansion Valve When Replacing a Compressor?
Cabin Air Filters
Temperature Testing Methods
Diagnosing Ford’s Electronic Blend Door Actuator for Manual Air Conditioning/Heating
Fan Clutch Rotation
Heater Hose Replacement
Condenser Comparison
GM Truck High Pressure Condition
What Role Does Humidity Play?
Vacuum Terminology
Insufficient Heating in Winter
Clutch Coil Voltage Identification
Compressor Oil Slugging
The Downside to Dye Leak Detection
Electronically Controlled Heater Valves
Blower Motor Speeds
Ohm’s Law
Testing 1988 – 1993 GM C,K Series Blend Air Motors
Ford Erratic or Insufficient Temperature