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Low on coolant. Stuck open thermostat. Plugged heater core. Faulty temp blend door.
The Blend air door is located inside the HVAC housing under the dash. Dash has to be removed to access.
There isn't a water control valve on a Dodge Ram. The heater core gets full flow all the time, the amount of air inside the HVAC housing that goes through the heater core is what regulates output temp. That airflow is controlled by a blend air door.
I do not have heat in the car and the blend door clicks. How do I access the blend door in a 2005 Ford Explorer?
The heater blend door is not run by vacuum. It is run by an electric actuator.
The temperature blend door may be at fault.
How do I locate the heater blend door actuator in a Ford f150 pickup
The blend door actuator on late model Dodge Durango and small pickup can be accessed by removing the glove box. There is a very common problem with blend door failure in these vehicles, and dash removal is required to perform the repair. A cheap and easy DIY fix for this can also be found at heatertreater. They also make a heater core regulator which bypasses the blend door and can remedy the situation with no dash removal.
On the bottom of the heater/ac assembly in front of the passenger compartment . YOU KNOW BEHIND THE DASH .
It does not. It is cable controlled thru a "blend door". If you are having no heat, it could be because of a clogged heater core, or the cable has came off the blend door, or the blend door control.
Assuming you want it to blow hot, it could be low on coolant, a stuck open thermostat, a plugged heater core or a faulty temp blend door.
It does not use a heater valve. The engine temperature us regulated with a thermostat and the outlet temp of the HVAC system is controlled with an airflow control door called a blend air door. The thermostat is located under the housing that the upper radiator hose hooks to. The blend door and actuator are in and on the HVAC housing under the dash.