If the thermostat in your 1995 Grand Cherokee has stopped working, you'll notice that the blower motor that pumps warm air into the car is only blowing cold air. The good thing is, the engine will not overheat, but it can get really cold trying to drive during the winter months. The thermostat in the Grand Cherokee is designed to fail in the open position, which prevents the engine from overheating, but it also prevents heat from circulating in the vehicle.
Remove the radiator hose from the thermostat intake tube by prying the retaining clip loose with a flat head screwdriver. Slide the clip down the radiator hose and pull the hose off of the intake tube.
Remove the two bolts that hold the thermostat intake tube onto the intake manifold of the Grand Cherokee with an adjustable wrench. Pull the intake tube off of the manifold by pulling up on it. Set the intake tube off to the side for now as it will be reused later.
Pull the thermostat out of the hole in the intake manifold and discard it. Pull the old paper gasket off of the mating surface of the intake manifold and discard it as well.
Place a bead of RTV silicone on the bottom of the intake tube and let the RTV cure for 15 to 20 minutes before proceeding.
Place the new thermostat into the intake manifold of the Grand Cherokee with the end marked "Top" facing out of the intake manifold. Bolt the thermostat intake tube back onto the intake manifold.
Slide the radiator hose back onto the intake tube and secure the retaining clip. You may want to replace the old retaining clip with a band clamp. A band clamp can be secured tighter than the old retaining clamp, thus limiting the possibility of leaks.
