Stalling at idle and no water in bottom radiator hose

What is your question?

Hello, I have a 1997 Avenger ES 2.5 engine. The car only has 150,000 miles on it and I try to do all of the maintenance on it myself being an old air conditioning mechanic but this one has me stumped. The car started stalling at an idle but it was running okay so I cleaned the throttle body and changed the fuel filter. That helped some but not much. The car these started to run a little warm, just over half way on the gauge, so I changed the thermostat but saw no water in the lower hose. I changed the thermostat anyway and now the gauge does not get up past half way but I have no heat coming out of the dash, blower is working. I did noted some, but not a lot of bubbles when I took the cap off of the thermostat housing. I added some Bars Leak in case it was a head gasket but I still have the same problems of stalling at idle and no heat. I am looking for things to check out. There is no light on in the dash. I replaced the TPS and fuel pump relay.

What makes this problem better or worse?

Running at idle makes the car stall at times.

How long has your 1997 Dodge Avenger had this problem?

Around a month