When i turned on the heat it blows cool air, where should i check first heat exchanger or electrical?
Thermostat only controls coolant to radiator fill radiator with coolant with hot engine, feel the heater hoses, if both are hot, you are getting coolant to the heater core. if you are still not getting heat, then the blend door isnt directing the air away from the a/c evaporator and to the heater core. possible causes, broken blend door hinge, blend door actuator inop, blown fuse, interior temp thermostat inop, vacuum line disconnected
do this first, it is the easy and cheap way, go buy a gallon of antifreeze and a thermostat w/gasket, change your thermostat and fill back up. crank it and let it get all the air out of the line. try your heater and if that dont work, have fun changing your heater core cause it sucks. i just did mine afew months ago on a grand cherokee. took two of us about two hours. it is a small looking raditor thats behind your glove box. you will have two lines under your hood that goes into the pasanger side of the vehicle. you will have to get a special tool to break apart the fittings. they are just called a/c quick release fittings. good luck man and hope you get it fixed soon
I agree with the other posters. Check your coolant and replace the thermostat with correct OEM temperature if you haven't changed it in a while. I always change the thermostat when I change coolant. In my case, the heater core was clogged when the water pump failed. The later model Rangers like yours have a heater control valve that can go bad. Good luck.
Heater core needs replacing.Should be located under dash. Thermostat has nothing to do with it unless you want more hotter heat. It controls the opening and closing off of water circulation is all. It'll be hot no matter what, even with a 160 degree installed it would still blow heat. A 180-200 degree thermostat will spit more heat out on those colder days. But you want the engine as cool as you can keep it for long life living and longer in between oil changes. Some run the hotter ones in the winter and swap back to the cooler one in spring.
The first thing you need to check is your coolant level. Lack of water/antifreeze in the radiator will cause cool air to blow thru the vents. Hope this helps. Good Luck.
