Heater Lockout Switch: Service and Repair

Removal

Thermal Blower Lock (TBL) Out Switch:

1. Disconnect battery ground cable.
2. Disconnect electrical and vacuum connectors from TBL.
3. Loosen hose clamps at TBL and remove TBL from the hose.

Installation

1. Slide new hose clamps over ends of hoses.
2. Apply soapy water to ends of hoses.