always low on coolant,no leaks,new pressure oil switch replaced, no heat on 1997 Oldsmobile Silhouette

thermo signal runs high after 5-10 mins then goes to zero. new thermostat placed last year. Blows cold air still after 1/2 hr(unless on highway),fans dont blow well except rear blowers

by in Altoona, PA on January 22, 2013
1 answer
ANSWER by on January 23, 2013
ck coolant level or poss thermostat is sticking open