My heater is not working?

Do the heater hoses get hot? It sounds like a blend door is not working but to be sure lets run down this guide which will help us pinpoint the problem.

https://www.2carpros.com/articles/car-heater-not-working

Please run down this guide and report back.

Check thermostat at 1st and replace if needed

open hood and check coolant in the radiator when engine is cool
open radiator cap and check coolant start engine and check if low add as needed and check for leaks

start and warm engine
locate heater hoses by the firewall and check if both hot and if so and have no heat
suspect blend door issue in the HVAC

my 1st suspicion would be low on coolant and would recheck the level in the radiator

Recheck the thermostat and check for heater core blockage and if it has a heater control valve check that too-could also be a air mix/blend/mode door problems to include vacuum devices/actuators

Hello, I'm not sure why it only blows cold air. The blower motor is blowing fine in all speeds, right? Did the heater work ok? And all of a sudden quit? Do you have front and rear heat/ac or just front? And do the control for temp. Feel ok? See if you can feel the heater hoses going into the interior from inside the engine compartment for heat? Ok, you have a 3.3L there may be a problem with the door actuator if heat is available at both hoses. Is it a 3.0L?

The hoses come out of the engine, if they have no heat, the interior won't either. If the thermostat was replaced for a no heat condition its best to make sure these hoses are getting hot, the water pump may not be circulating any hot coolant. Bring it back. The core inside, the control door, there's more to the climate control, it may be this, ok? With 180,000 it may be the engine letting air enter the system also, after replacing the thermostat, testing for heat is the first step, checking the heater hoses and controls is next.

If both heater core hoses are hot, then the heater core is hot too. That leaves the blend door (mixing door). Something isn't working right with them. Check that again.

Check the radiator if its clogged-up and water pump functioning properly

If I understand correctly, the temperature gauge will read in the "normal" range, you slide the temperature lever to "hot", but you still get cool air. If that's correct, there was a common problem caused by rust buildup on the pivot for the temperature blend door. The door sticks in one position, but the temperature slide **** appears to be working. In fact it is not. The cable attaches to the door's lever through a three-fingered clip. That is the self-adjusting feature, but when the door binds, the cable just slides through that clip and doesn't move the door. The clue is you won't hear the nice "thump" when you move the lever fully one way or the other. Another clue is the two heater hoses going to the heater core will be hot. If that sounds like what you have, I can describe the repair procedure. You'll need a rag, a can of spray oil with a stem, (Chrysler's "Rust Penetrant" is recommended), a can of "Spray White Lube", (also from Chrysler), and a drill and about a 1/8" drill bit.

Tamra, Make sure both heater core hoses are getting hot with the heater on and the engine running at operating temp. If one is cooler than the other, there is a good chance the core is plugged and may need flushed or replaced.

Let me know what you find.

Joe

Is it blowing cold air or no air blowing
at all
let me know
cool air :check coolant level and or
check / replace thermostat