Recently the heat stopped working on my van. I followed the troublshooting from the Haynes guide. Replaced the thermostat and replaced the coolant. Before I took a garden hose and ran water through the heater core to check for a blockage, there was none. I am at a loss as to what else to check. On a side note the battery was replaced just a few days before the heat failed. Not sure if that's connected. Any suggestions?
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First i would be sure the cooling system is full and put the cap back on. Make sure the over flow bottle is filled the the top full mark. Then drive the van with the heater on high temp and low fan. This will help to bleed any air that is in the system. When do get heat coming out of the vents, with engine still running.Remove the cap carefully and fill the rest of the system if needed.
I did as you said. Drove it around again after topping off the coolant and still wasn't getting any heat. Could the water pump need replacing? I haven't noticed any odd noises coming from the engine as if the bearing on the pump has failed.
I am having the same problem with my 04 model. The thing is that I am not very experienced with automechanics and I am having to take my vehicle to a shop for every repair. I have deduced that it is not the heater core(I dont have antifreeze leaking in my floor boards) and people have told me different things. The tester at autozone said that my Ambient air temp sensor is out, but I dont have a temp gauge inside my van that tells me the outside temperature. I have had my radiator, intake manifold gasket, and a gasket leaking transmission fluid replaced in the past four months, among other things like brake pads etc. This is just driving me crazy because my heater was just fine last year. Any help would be greatly appreciated because it costs over 70 dollars to put it on a diagnostics machine.
Thank you for that diagram. I am going to see if they are getting hot. I just would like to find out the problem and look up prices to get the problem taken care of before I take it to the shop. Its getting cold out there and the heater is something that needs to be fixed immediately. So anyway, I am very thankful for all the help!
I am getting the same thing on my 04 Dodge Caravan
I just added some fluids because it was low. It also looks like I have a leak somewhere. I've been getting a noise for almost a year now coming from where the belts are at. I replaced my serpentine belt, idler pulley, and belt tensioner and i am still getting the noise squealing and rattling. I am wondering if it might be my water pump that needs replacing. Can the leak and noise be coming from the water pump?
I am having the same issue. Thermostat is working. Both heater hoses are hot so there is flow through the core. The radiator is full, no recent leaks. Has anyone had problems with the heater controls on the dash? I suspect that is the problem.
When you move controls from hot to cold or cold to hot can you hear the blend door move. It is under the dash you might have to get down on the passenger side floor to hear it. Diagram is on previous page.
Took it to Dodge stealership for diag. They found the blend door is not working & wanted $1500 to fix it. I complained because it only has 37,000 miles on it. The warrantee expired at 36,000. They called corprate & they agreed to fix it for a $250 deductable. Whew!