Hello:

I busted my old heat exchanger when I was working on my 94 Jeep Cherokee Country and when I since I have connected the new one I have no heat. I also put a new thermostat in as well. When I hooked up the exchanger I was not sure if I hookd up the hoses coming out of the firewall to the right ports. Any hep would be greatly appreaciated.

Bottom one comes from the water pump.

Top one goes to front of engine where the top rad hose goes and the temp sender.

You can run a water hose through the bottom one to make sure it is not blocked. Remove the top one and see if it flow.