There are quite a few comments online about Dodge pickup heaters. I have a 98 1500 and it works great, but in my 2002 you might as well be sitting on a block of ice. I think my 2002 is going to be different that your 97. But on my 2002 these are the common problems. #1) Broken blend door. The blend door never closes therefore when it is really cold out the outside cold air is always mixing with the air you are trying to heat. My blend door is OK as I can feel a difference between cold and hot when driving down the road with the "vent" turned on and putting ones hand up to the vent outlet while turning the knob from L to R. #2) thermostat - temp gauge was coming up OK anyway, but changed it anyway to no satisfaction. #3) Plugged heater core. Common problem I have been told. Many dissimilar metals in the engine and silicates in the antifreeze block the core tubes. Some indicate that on a hot engine the incoming heater hose should be hot and if the heater core is taking coolant the outgoing heater hose should be warm as well. I took my heater hoses off at the engine and put some Justice Brothers cooling system cleaner in the heater core using a funnel. Was told Justice Brothers was the best. I did get some improvement, but eventually lost heat again. I wonder what running "Iron Out" or some of the calcium/rust cleaners into the heater core would do??? 4) Was at the Dodge dealer yesterday and the service manager said they were also having problems with the temperature control panel. My guess would be the heater core. There are some U-tube videos on cleaning/blowing out heater cores. Fortunately I have other vehicles, but will eventually want mine fixed. The problem is it might take $700 to get to the heater core. On the 2002 I have been told the dash has to come out. Try flushing yours once.
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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