Many reasons: low coolent, stuck heater valve, stuck flap that direct the heat to the cab, clogged heater core.Find the pipes the feed the water to the heater, they are on the right side of the firewall at the rear of the engine. Two rubber hoses connect to them. Warm up the engine and turn on the heat. Check the before mention pipes/hoses and see if one hose is hot and the other one is less so. Hottest water in from engine slightly cooler going back to engine. If they are the same temperature your heater core maybe plugged.
It may need a heater core.
bypass valve not opening
I have a '99 Cirrus, where both the heater and A/C did not work - I ended up having to get the fan engine and rad changed out - $1500 I believe....
They are entirely different systems. One does not control the other. You have a problem in your heater core, heater control, water circulation or hoses.
You most like have a bad blower motor resister.......
Check your fuses for these devices. Or while under the dash you have accidentally unplugged them.
Sounds like a defective heater core
no it will work just fine. my 95 bird's odometer doesnt work but my cruise and trans work just great!!
Blown fuse, defective fuel pump relay, or the pump itself is defective.
Bad blower motor? Blown blower motor fuse? Bad fan switch? Bad blower resistor pack?
I have 95 cavbalier new heater cor new thermostat puts out very little heat any suggestions
you need to replace your heater core.