|
It could be one or more of the following:
Low coolant level
incorrect thermostat
restricted coolant flow through heater core
heater hoses plugged
mis'adjusted control cable
sticking heater controll valve
vacum hose leaking/blocked
vacum motors busted
blocked air inlet
inoperitive blower moter
oil res in heater core fins
dirt on heater core fins
I hope this helps.
__________________
Robert
1955 Oldsmobile Super 88 
|