I've had the truck going on 5 yrs. Never had great heat, but it's getting worse. Now it practically has no heat. What little there is comes when it is idling. Start down the road and it's cold air.
SYMPTOMS: No heat (very, very little anyway) when moving. SOME when idling.
WHAT I'VE DONE: (in the last 6 months)
- New Radiator
- New water pump
- New thermostat
- New heater core
ADD'L INFO: Both heater hoses are hot once the truck is warmed up. A bit warmer air when you turn it to "recirculate".
I'm wondering if it's a vacumm leak somewhere. Is the heater control/blend door vacuum operated?
Truck has 290,000 miles. Never been to a dealer since I've owned it but I'm throwing in the towel. Have an appt next Tuesday but if ya'll could help me before then I'd appreciate it!
Thanks!