1998 Cadillac Catera Q&A
1998 Cadillac Catera Question: NO HEAT ?
The heater runs off your engine water/coolant. It's very possible that the thermostat is stuck open.The thermostat will open and close under normal conditions to keep the engine at its optimal temperature. If it stays open at all times, the water/coolant never gets hot enough to produce any heat as it goes through the heater core. The bad news is that the exact opposite can happen and it can get stuck closed and cause the car to over heat...... so my suggestion is to have it looked at as soon as possible. - ShaneG
i reciently had the service engine light oil light and coolent lights reset on car after having it overhauled. new plugs wires oil change coolent flush by a sertified mechanic.now my temp read out ...