Kenworth T600 Heat & AC Parts

Frequently Asked Questions About Kenworth T600 Heat & AC Parts

What years are these HVAC parts compatible with for the Kenworth T600?

Our Kenworth T600 heating and air conditioning parts are designed to fit models from 1985 through 2007. However, there were minor changes in the HVAC system design around 1994 and again in 2000. Always verify your specific model year and OEM when ordering components like evaporator cores, heater cores, or complete HVAC boxes, as mounting brackets and connections may vary between early and late model years.

How difficult is it to replace the heater core or evaporator core in a T600?

Replacing these components requires intermediate to advanced mechanical skills and typically takes 4-6 hours. The dashboard must be partially removed to access the HVAC box behind the glove compartment area. You'll need basic hand tools, trim removal tools, and a refrigerant recovery system for A/C work. Many drivers find the heater core more manageable as it doesn't require evacuating the A/C system. We recommend having a service manual specific to your model year for detailed removal procedures.

What's the difference between OEM and aftermarket HVAC parts for the T600?

OEM parts are manufactured to Kenworth's original specifications and typically feature aluminum cores with brass tanks. Aftermarket options often use aluminum or copper-brass construction and may have different fin densities. While quality aftermarket parts can perform equally well and cost 30-50% less, ensure they meet or exceed OEM specifications for cooling capacity (BTUs) and pressure ratings. Look for parts that specifically state compatibility with R134a refrigerant systems.

Why is my T600's A/C blowing warm air even after recharging the refrigerant?

Common culprits include a faulty compressor clutch, clogged orifice tube, failing expansion valve, or leaking evaporator core. Before replacing major components, check the compressor clutch engagement, inspect for oily residue indicating refrigerant leaks around fittings, and verify the condenser isn't blocked with debris. The blend door actuator is another frequent failure point that can prevent proper temperature control even when the A/C system is functioning correctly.

Are there upgrade options available for better heating and cooling performance?

Yes, several upgrades can improve HVAC performance in older T600s. High-efficiency parallel flow condensers provide better cooling than original serpentine designs. Upgraded blower motors with higher CFM ratings improve air circulation. For models originally equipped with R12 systems, complete R134a conversion kits are available. Additionally, installing auxiliary cab heaters or sleeper air conditioning units can supplement the factory system for extreme weather conditions.