Hi, my wife just purchased a nitro last October. Interesting vehicle. She brought it to our local mechanic because no heat. He changed the thermostat and still nothing. He was out of ideas. I brought it to a franchise rhymes with step toys they didn't have time either but said it needed a heater core flush. Fair enough. I couldn't do it myself, had cancer back in March just getting back to feeling my hands. I brought it to another franchise and they said I needed a thermostat, water pump, new radiator out the door 1900 to 2100. 🤣🤣🤣🤣. Sure. I handed him the complete diagnostic sheet from step toys and he says oh...well we can do the flush for 39.00. We now have heat. Why do I bring this up, to thank you for forums. They actually help educate us common folk.