Heater not heating

I have a 2008 Chrysler Sebring Touring (Convertible). Recently, out of the blue, the heater quit supplying hot air. I took it to my local mechanic who 1) replaced the thermostat and 2) replaced the blend air door motor. After 4 days and $$$$ I was told it was fixed. Now it blows only “warmish” air on the driver’s side and cold air on the passenger’s side. Any suggestions?

when the mechanic replaced you thermostat, no doubt he put in new coolant. Was that the first coolant change for this engine or have you kept up with the maintenance schedule for the cooling system? If you had not, the heater core may be clogged up. It can be flushed out easily without draining your entire cooling system.

Check for a kink in one of your heater hoses first though.

burp the cooling system

or a clogged heater core

I agree. The very first thing to do is check for air in the system. Then go from there to other good suggestions.