1998 Ford F-150 Q&A
1998 Ford F-150 Question: if it doesn't have a heater control valve then what could be wrong with it ??
If there is no heater valve, what could possible be going on ? - Visitor
What are the symptoms?? Zee - ZeeTech
You could have a temperature blend door actuator issue in the dash, failing to turn the blend door to "hot". You could have a flow issue at your heater core - it could be clogged? You could have a thermostat issue at the engine. - DaveJHM