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1968-2013 Full Size Vans Econolines. E150, E250, E350, E450 and E550

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  #1  
Old 12-31-2009, 07:41 PM
ianobetz ianobetz is offline
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Rear Heater Not Working

I just purchased a pretty nice, older ford E-350 superduty van. It has rear AC/Heater. The front heater works great, but the rear heater does not blow hot air, just cold. There's no place to adjust the temperature on the rear heater (it runs off the front controls).

The Haynes manual doesn't go into the rear heater too much, so I was looking for some direction. Does anyone have any suggestions on where to start my diagnosis?

Thanks for your help, Ian
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  #2  
Old 01-01-2010, 12:15 PM
ianobetz ianobetz is offline
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Update:

I did some snooping around in the rear heater... The condenser in the back is getting hot, but there's no air going through the intake to pass through the condenser. I'm not sure how to get in the compartment to check things out though.
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Old 01-01-2010, 01:17 PM
gearloose1 gearloose1 is offline
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Turn on the rear fan for a start.

Make sure that the Front control is on "Heater".

NOT AC.
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Old 01-01-2010, 03:32 PM
ianobetz ianobetz is offline
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Well... I guess I asked for a place to start didn't I? Thanks gearloose1. At least you didn't tell me to open the door, insert key into the ignition and start the engine.

I've gotten to the blower motor in the back. It seems that when I turn it from cold to hot on the thermostat, the door inside the blower assembly doesn't switch from A/C to Heater. The vacuum line looks like its in good shape, but makes no sound when turned from cold to hot. Has anyone run into a problem like this?
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Old 01-01-2010, 04:01 PM
ianobetz ianobetz is offline
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More troubleshooting resulted in getting the heater to work by disconnecting the vacuum line that goes to the blend door actuator. When I disconnected it, the door opened right up and switched from AC to Heat. So no matter where I the thermostat is on the panel, the vacuum line is keeping the heater door closed. Sounds like an instrument panel issue. Any help from here?
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Old 01-01-2010, 04:44 PM
gearloose1 gearloose1 is offline
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Vacuum control switch on the front panel is the next place to check.

Find out why it is not delivering or shutting off vacuum.

Is the line normally on (vacumme) or off (no vacuum)?

If you can find the routing... sometimes, the line is kinked... or alternatively, plugged.

Compressed air carefully used can help --- be careful not to damage anything using too high a pressure...etc...


Do you have a kinked line?

Check that first.

Then check the dash switch and see if the line is pulling vacuum...
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Old 01-28-2010, 10:27 AM
getout getout is offline
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Did you end up figuring out what was wrong? I've got the same problem in a van I just bought. Haven't gotten into it yet but now that I've got a place to start I might get it pulled apart over the weekend.

Thanks!
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Old 11-08-2013, 02:59 PM
Joseph Luke Plotts Joseph Luke Plotts is offline
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I have the same prob with my e150.....any solutions?>???
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Old 11-08-2013, 03:03 PM
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JWA JWA is offline
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Originally Posted by Joseph Luke Plotts View Post
I have the same prob with my e150.....any solutions?>???
Do you have a Club Wagon or other high trim level van---or is your rear heater assembly uncovered?
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Old 10-21-2014, 12:55 AM
E350_traveller E350_traveller is offline
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hi guys,
i have the same Problem. I have a '92 E350 7,3l Diesel
I found an open connection of the vaccuum at the right side of the heaterbox in the front but i cant find the hose which seems to fit in there.
It seems, that the hoses which go into the rear heaterbox are not getting warm.
any suggestions?
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  #11  
Old 10-21-2014, 06:06 PM
ligito ligito is offline
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Can you disconnect the vacuum hose at both ends and blow low pressure through, to clear any obstructions?
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Old 10-21-2014, 11:19 PM
E350_traveller E350_traveller is offline
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I disconnected the blue vacuum hose in the back today and then there was air blowing only on the floor and still cold. I connected it back and in ac and venting mode it was blowing on top again.
Then i checked the vaccumhoses in the front. looks like this. four connections are open, but there are no more hoses to connect.
Click the image to open in full size.


Click the image to open in full size.

is there somewhere a valve i can check? i could not find the heaterhoses for the rear in the motor compartment. i only found the a/c hoses.
ACin the back is working also when there is warm air in the front
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  #13  
Old 11-11-2014, 06:29 PM
ligito ligito is offline
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Would it help, if you plugged the open ports?


Quote:
Originally Posted by E350_traveller View Post
I disconnected the blue vacuum hose in the back today and then there was air blowing only on the floor and still cold. I connected it back and in ac and venting mode it was blowing on top again.
Then i checked the vaccumhoses in the front. looks like this. four connections are open, but there are no more hoses to connect.
Click the image to open in full size.


Click the image to open in full size.

is there somewhere a valve i can check? i could not find the heaterhoses for the rear in the motor compartment. i only found the a/c hoses.
ACin the back is working also when there is warm air in the front
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Old 11-11-2014, 06:29 PM
 
 
 
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