Details

• Brand:

  

  

• SKU:

  JL3Z-18495-C

• Other Names:

  Solenoid Assembly, yg820

• Description:

  This is a genuine Ford HVAC heater control valve, sometimes referred to as a heater bypass valve or solenoid, for the F-150 platform. The valve regulates coolant flow to the heater core in response to commands from the HVAC control module, allowing the system to deliver warm air on demand or to bypass the heater core during air conditioning operation for improved cooling performance. The valve is a small electromechanical solenoid that opens and closes against coolant pressure to direct flow according to the control module's commands. Failure modes include solenoid coil failure that prevents the valve from changing position, internal seal failure that leaks coolant past the valve when it should be closed, electrical connector corrosion that produces intermittent operation, and mechanical sticking from internal corrosion or contamination in the coolant chemistry. Symptoms include cabin air that remains warm even with the heater control off, cabin air that fails to warm on demand even with the engine at operating temperature, intermittent cabin temperature control problems, and in some cases coolant leakage from the valve body. Diagnosis usually involves activating the valve from a scan tool while observing whether it responds, and measuring coolant flow through the heater core hoses with the valve commanded in each state. The genuine valve carries the correct coil resistance and flow characteristics for the F-150 HVAC calibration. Replacement requires partial coolant draining, careful disconnection of the hose lines and electrical connector, and methodical reinstallation with attention to orientation and clamping. Refill and bleed the cooling system before testing.

WARNING: California Proposition 65

×

California Proposition 65

WARNING: Cancer and reproductive harm - www.P65Warnings.ca.gov