Frequently Asked Questions About Kenworth T700 Heat & AC Parts

Will these HVAC parts fit my specific year model Kenworth T700?

Most of our heat and AC components are designed to fit Kenworth T700 models from 2008 to 2019. However, there can be variations based on your truck's specific configuration and factory options. We recommend checking your VIN or calling our tech support at 1-888-875-7787 with your truck's year, model, and current part numbers. Key differences often occur between pre-2013 and post-2013 models due to refrigerant type changes from R134a to R1234yf.

What are the most common signs that my T700's heater core or AC evaporator needs replacement?

For heater cores, watch for sweet-smelling coolant odor in the cab, foggy windshield that won't clear, wet passenger floor mats, or low coolant levels without visible external leaks. For AC evaporators, common signs include weak airflow, musty odors when AC runs, water dripping inside the cab instead of underneath, or AC that cools intermittently. Both components typically last 8-10 years but can fail earlier in harsh operating conditions.

Can I replace the blower motor without removing the entire HVAC box?

Yes, on most T700 models, the blower motor is accessible from under the passenger side dash without removing the complete HVAC assembly. You'll need to disconnect the electrical connector, remove 3-4 mounting screws, and carefully lower the motor. The job typically takes 30-45 minutes. However, if you're also experiencing airflow issues, check the cabin air filter and blower motor resistor, as these often fail together.

What's the difference between OEM and aftermarket AC compressors for my T700?

OEM compressors (typically Sanden or Seltec/Valeo) come with exact mounting specifications and proven durability but cost 40-60% more. Quality aftermarket units from brands like Denso or Four Seasons offer similar performance and often include the same internal components. The main differences are warranty length (OEM usually 2 years vs. 1 year aftermarket) and clutch assembly quality. For trucks with over 500,000 miles, aftermarket options provide excellent value.

Do I need to replace other components when installing a new AC compressor?

Yes, proper AC system service requires replacing the receiver-dryer/accumulator and expansion valve whenever installing a new compressor. This prevents contamination and ensures warranty coverage. You should also flush the AC lines and condenser to remove debris. Most compressor failures leave metal particles in the system that will damage your new compressor if not removed. Budget an additional $150-250 for these supporting parts and refrigerant oil.