heat problems

[white91beast]

im having a problem with my heat it blows only when im moving idk if its the blower or not if anyone has any ideas that would be sweet

 

[Seabronc]

Does it switch to defrost or completely lose heat?

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[white91beast]

Does it switch to defrost or completely lose heat?

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It switches fine to all settings I just installed a new heater control check valve it just doesn't blow out heat unless the truck is in motion

 

[white91beast]

It switches fine to all settings I just installed a new heater control check valve it just doesn't blow out heat unless the truck is in motion

And it doesn't blow out very hard

 

[BroncoJoe19]

Check your coolent level, if it is low, reving the engine may make a difference.

If on the other hand you mean that your blower fan is not blowing, you may just be getting some air blow through the system when the truck is moving.

I think that you mean that the blower is not blowing. First thing to check is your fuses.

Next would be to supply power and a ground to the blower motor to see if it works,

OR to check for power to the motor with a test light.

IF you have power, to it, then supply a good ground to it. IF that works then look for and replace the blower motor resistor (I assume that it has one).

good luck

 

[AdamDude04]

Yeah has to be a blower or low coolant. My thermostat is stuck open and I place a wooden panel between my radiators to keep air from cooling the large radiator. Summer it gets no hotter than 210 and fall/winter hangs out around 130/140. With my wooden board around 160. I still get great heat, just takes 5 min to get it on a cold night..

 

[miesk5]

yo white91beast,

Great advice from the friends here!

Does the Blower work swell on High Fan Speed?

if so, ck the resistor pack; usually connector/wiring or R pack is burnt out.

NAPA has replacements

Connector for resistor Ford PN E7TZ-19A706-A in 84-96 looks like this;





pics by Steve83

The red pointer is where the cowl drain boot should be.



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Leaf & Debris Build-Up Location pic in 80-96 Blower Motors & Ducts Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net

http://www.supermotors.net/clubs/superford/vehicles/registry/media/71652

"This shows where leaves build up in '80-96 truck ductwork. If they build up around the resistors (green), the entire truck can catch fire if the motor (yellow) is NOT at full speed all the time."

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If blower does not work on any speed & ducts etc are clear..., do as our pal Joe advised

Wiring Diagram (no year given, but shows E4OD) Source: by Dustin S (Dustball, Mellow Yellow, Mr. Laser Boy) at ylobronc.users.superford.org

A Long Shot;

Temperature Blend Door Cam Spring Does Not Blend Door to Seat Properly was a TSB for 92 Broncos and may apply here; if blower ends up working and heat is not as warm as it should be w/engine & coolant at Norm op tempLack of Heat, Temperature Blend Door Cam Spring Does Not Blend Door to Seat Properly TSB 92-4-13 for Vehicles Built Prior to 11/11/91, 92 Bronco & F Series & F-47 Source: by Ford via Chilton

Sometimes vehicles built late in the production year may get parts fro next MY (model year)

Probably the temp blend door is loose & flopping around on its own. The easiest way to see it is to fully lower the glove box, pull the ~8 screws from the heater core cover, & look inside to the L (driver's side). You'll see the cable & control lever (in top L of 2nd pic) as soon as you fold the glovebox down, so inspect it first. The 3rd shows the whole cover - it's the large section in the top center with tiny white numbers inked near its bottom edge. The cables are visible, too.



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http://www.supermotors.net/registry/media/71811

You'll see the cable & control lever (in top L of 2nd pic) as soon as you fold the glovebox down, so inspect it first

See this pic and caption; I can't load the thumbnail due to Bronco Zone

programming

http://www.supermotors.net/registry/media/71799_1

 

[Seabronc]

I think miesk5 is narrowing in on it. Rereading your original post, I'd suspect that the blower motor or it's control is the culprit. However, I have had leaf debris problems in the past. They pretty much had my ductwork clogged. That is more prevalent with 80-86 Broncos because because of the large slots in the cowl. The small holes in the 87-96 pretty much prevents that problem. By the way, a cowl for the 87 through 92 (I believe it is) has the same profile as the 80-86 and makes a great upgrade. I did that several years ago. Haven't had a problem with leaves since.

Good luck,

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