2007 Ford Expedition EL SLT Climate Control Blower Speed Issues

[Ronald brown]

Good evening all,

Thank you for allowing me to the forum. I purchased an Expedition with 336,000 miles and it appears to have been very well taken care of. I have a few minor issues and I am attempting to sort them out.

1. The blower to the manual climate control blows stronger on the #2 setting, and barely at all on the other settings. I replaced the resistor and no change. I then replaced the blower motor and still no change. The rear blower doesn't appear to be blowing either. What do you all suggest as my next items to inspect? What controls the fan speed other than the resistor. I first believed it was only blowing on setting #2. When I pulled the motor and checked, it was actually blowing very slowly on the #1, #3, and #4 settings.

2. My tire pressure monitor fault light and message is showing. I checked the pressure and adjusted the psi. The light is still on?

3. My radio does work and has no display. The entire screen is not displayed. Any suggestions?

Thanks for your help.

Ron
Richmond, VA

 

[Yupster Dog]

I replaced the resistor and no change.

Was the wire harness for the resistor burnt or melted at all? they are famous for needing the harness to be replaced as well.

 

[Ronald brown]

I will check that out in the morning. I did order a replacement when I ordered the resistor. Thanks for your reply.

 

[Ronald brown]

There didn't appear to be any burnt areas on the pigtail. I also giggled it to see if there were any shorts and no change.

 

[mrbadwrench]

You could try using a voltmeter to check from the wires going to the resistor to ground, but I suspect you will need a new switch.

 

[Ronald brown]

Good morning I did replace the switch to the fan control, blower motor, and resistor. When I removed the bezel to check the fan speed switch I notice the power to it hasn't come back on. I checked the fuses under the passenger dash and all three for the climate control look good. I did replace the switch today because I noticed it had a small brunt spot on it. Again the power to the panel in the dash doesn't appear to be getting power (no lights). Is there something I'm missing? Are there any other fuses that control the power to the climate unit on the dash?

 

[dcsang]

Check the blower relay if you're not getting any voltage to the blower motor. It's likely #1 in the engine compartment fuse box.

 

[Ronald brown]

okay here is my update. i changed the blower motor relay in the engine compartment. After doin so there wasn't any change. I have a manual climate control until in the vehicle now. I had ordered an electronic unit with the hopes of swapping them out. I decided to swap out the electronic unit and the blower is blowing slow. the electronic until will only connect using the two big plugs. is there an adapter I can get to hook up the third smaller plug? When get home i will connect my new blower motor with the electronic unit to see what happens. The resistor I'm using is a new one.

 

[Ronald brown]

if I have a manual climate unit and a basis radio cd player, can i swap out a factory radio with navigation and electronic climate unit?

 

[Trainmaster]

The automatic temperature control cannot replace the manual one. Different harness, different heater box configuration and several additional sensors. Order a replacement manual control on ebay. Even the manual controls have lots of electronics in them and they fail in the way you describe.

Sounds like you checked every other possibility anyway, the most likely being the resistor and its connector, as the Yupster says.

The radio with navigation is a direct plug-and-play replacement in 2007 and 2008. But the new radio must be configured for a similarly equipped Expedition. If you get one from a truck with a woofer, you need a woofer. If you get one configured for a different model vehicle, the harness will plug in but the wiring assignment will be different. There are places that will program a 2007 and 2008 radio. You can find them on line. A navigation antenna can be installed under the dash pad atop the radio support. Note that most of the used radios this old have inoperative CD players, so check what you buy.

 

[Ronald brown]

Excellent and thank you for that information. I will source another manual climate control unit. I will also debate if I really need the fancy radio or not. I will also double-check the harness. When I purchased the resistor it came with a replacement harness. Many times Thank You!!!

 

[Ronald brown]

Thank you for this helpful information, I will source a working manual climate control unit. I will also evaluate it I really need a more fancy radio with navigation. Much appreciated.

 

[Ronald brown]

Good evening all

I have an interesting question related to my problem. I ordered a certified replacement manual climate control unit because mine wasn't coming on and no lights. I temporarily installed the electronic one I had previously ordered so I could have some functions. Tonight the replacement unit came and I installed it. I had the same results as my original manual unit. It doesn't come on as if no power. I do know there is power because the electronic unit works. What the heck am I missing?

 

[dcsang]

How handy are you with a multimeter? I do not have the circuit diagram for your climate controls but there are very knowledgeable members in this forum. I suspect your power and ground connections need to be verified in a logical manner to isolate the precise cause of your issue. There are differences between the manual and automatic controls as Trainmaster pointed out, so the wiring could be different even if the connectors are the same.

Did you acquire the vehicle with this problem and are you confident that it was originally equipped with manual controls?

 

[Ronald brown]

I did acquire the vehicle with the problem. I can check to see if it is original. The manual unit that came with the car was working with the original issue of low fan speed.

I have a multi-tester and with some instructions, I think I can handle the task. A manual climate control unit is the correct unit for my truck.

 

[dcsang]

Your blower should be ground switched. Verify that you have 12v on the input and output wires of the blower with the key on and the HVAC module in the off position. What colors are the wires connecting to the resistor? They should be grounded based on the position of the blower speed switch but that's where the diagram comes into play.

 

[Ronald brown]

Good evening dcsang I looked at the wires coming out of the resistor plug (green striped, light brown or dark red, gray striped, and black striped). I will also attach a picture of the plug. I've replaced the wires coming out of the plug in case of any burnt areas.

 

[sthomp99]

There are several of these threads. I am experience similar trouble with 2016 XL, "Electronic Manual Temp Control". Blower powered with ignition ON (HVAC: Off), Relays Good, Blower "Resistor" Good. Work around for now is grounding blower ground (Now Blower: High with Ignition ON). Problem is likely the CCM25 the HVAC Control Module. No luck sourcing $200+, salvage yard next... Wiring diagram found here on another tread... The Climate Control Module (CCM25) takes in all buttons inputs and outputs to all relays, speed controls, blend doors etc.