0
The Heater core is difficult to replace on the F150 since it is buried in the plenum box. Getting to the core involves removing the steering wheel, steering column, complete dash panel, evacuating the AC, draining the radiator, and finally removing the heater box. Once you have the box out(8-12hrs), the core is simple to replace.
You want to be sure that the core is the problem before you undertake this process. If there is a strong smell of antifreeze in the cab or a puddle of coolant on the floor, the diagnosis is easy.
Check that the radiator is full, not the overflow tank, the radiator. On a cold engine you can remove the radiator cap and check the level. It should be full. If there is air in the system it will affect cab heating and engine cooling.
Another good check is to feel the two heater hoses going into the firewall from a cold start. The hoses should warm up at about the same rate and get uncomfortably hot-close to radiator temperature.
If the core appears to be OK, the next concern is with the blend door that diverts air through the heater core. This is a common failure on the F150. We have a video posted on our web site that shows how to diagnose and repair the system. Please follow my user name back to my bio page to find a cut-and-paste link to the web site. You are only a few clicks away from solving the problems.
What else can I help you with?
How do you replace 2004 ford explorer heater control door actuator control module?
Check heatertreater.net for diagnostic information and a fix for the blend door/actuator problems endemic to this model.
How do you replace a 2004 silverado heater control bulb?
i need to replace the temperature control light bulb on my 2004 silverado.
How do you fix your 2004 GMC sierra heater vent control I can not switch the venting from defogger to anywhere else?
on my 2003 GMC 2500 there is a control module inside the heater duct work on the passenger side. It is easy to access and replace with a couple of screws. Replaced mine and fixed the problem.
Toyota Sienna 2004 has no heat?
Have you checked you heater control valve or heater core if working properly.
2004 explorer heater control?
how hard is it to replace the blending door
Seat Heater repair on 2004 Buick LeSabre?
To repair a seat heater on a 2004 Buick LeSabre, disconnect the connector and check for voltage. If there is no voltage, replace the switch. If there is voltage, check for an open circuit.
What is the clicking noise near my 2004 ford explorers heater control s?
The clicking noise near your 2004 Ford Explorer's heater controls could be caused by a malfunctioning blend door actuator, which controls the flow of air between the heater and the air conditioning system. It might also be due to debris or foreign objects obstructing the actuator's movement. Another possibility is a failing or worn-out component within the climate control system. If the noise persists, it may be advisable to have a professional technician inspect the system for any issues.
Why does my 2004 Monte Carlo heater blow cold air?
Low coolant? Bad thermostat? Heater control cable not adjusted properly? Heater core airbound? Heater core plugged?
Where is the heater control valve in a 2004 Buick Regal LS?
How to fix heater in Buick there is cool air ,fan is work .but no warm air
2004 e320 Mercedes Benz why is your heater bowing cold air?
check the heater control valve it should be 10 ohms of resistance
How do you replace the heater controls in a 2004 Ford Explorer?
IF the problem is with control over heat and AC, most likely the problem is with the blend door operation. It is a common failure on the 02-08 Explorer. Check heatertreater.net for diagnostics, pictures, and a repair solution.
Where is the heater control valve on a 2004 Lincoln LS?
the heater control valve or DCCV (dual climate control valve) is located next to the radiator on the passanger side just below the high pressure side service connector
