How to diagnose Jeep Grand Cherokee heater problem

[stevzie]

Back to the blend door… Both heater hoses are warm. Coolant level was very low so I fixed that and the gurgling/water rushing noise has stopped. I did not air bleed, but as both hoses are warm that doesn’t seem to be the issue. I think my next move is to pull the glove box and check the blend door. Thanks for the help. I’ll let you know how it turns out.