1990 3.0

I have no heat in the front of my van. The back blowers work fine but i have nothing coming from the front blowers. Someone had suggested replacing the blower motor. Any ideas?

 

Hi Ekmeian:

Welcome to our FTE forum

Check fuses first and replace even if it seems OK. Is the front blower blowing at all? It might be worthwhile to put 12V directly on the blower to see if it's still in working condition before you replace it, just in case the problem is in the wiring leading to it.

 

The front blower isnt blowing at all, while the back blower blows at all speeds. Checked the fuse and thats not the problem. Thank you for your quick reply

 

Now, try to get to the blower and measure the voltage going into the blower. It should be near 12V. If you have that and the blower is not on, chances are the blower is broken.

 

http://www.autozone.com/servlet/UiBr...3d8014b8a1.jsp

 

Are you sure that its not blowing across the windsheil like its stuck in defrost? If so you have a broken or disconnected vacuum line.

 

I tested with a 12 volt tester and had power. I've replaced the blower motor and now the blower motor is working. The new problem is, when the blower is turned on i can hear it blow at all the different speeds but nothing is coming out of the vents. The blower is on and blowing, just not out of the vents. Any Ideas?


also thank you all for your input.

 

I reiterate Khanty's comment about a vacuum problem. If a vacuum line comes off, which is common, all air is directed to defrost. check this. If the blower is running, air is going somewhere.

Ken

 

Section 12-03B: Air Conditioning System, Manual A/C-Heater, Aerostar 1996 Aerostar Workshop Manual

DESCRIPTION AND OPERATION

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Vacuum Control Motors
Vacuum control motors (18A318) are used to operate three damper doors: the outside/recirculating air door, the panel/defrost door and the floor/defrost door. Each of these vacuum control motors responds, in turn, to a function selector switch which is a component of the A/C control (19980). The diagram illustrates the vacuum circuits and the damper door position under V vacuum, PV partial vacuum, and NV no vacuum condition. The chart, which is part of the illustration, relates each function **** position to the status of vacuum application at each door.

Vacuum Logic





Item Part Number Description
1 — Outside Air Shutoff Door
(Part of 18471)
2 19860 A/C Evaporator Core
3 01610 Dash Panel
4 — Temperature Door
(Part of 18471)
(Cable Controlled)
5 18476 Heater Core
6 — Vent/Heat Door
(Part of 18471)
7 19A566 A/C Vacuum Reservoir Tank and Bracket
8 19A563 A/C Vacuum Check Valve
9 — Heat/Defrost Door
(Part of 18471)
10 — Diverter Valve
(Part of 18A318)


A/C-HEATER SYSTEM VACUUM MOTOR TEST CHART Function Selector **** Position Outside Air Shutoff Door (Port 1) Partial Heat/Defrost Door (Port 3) Full Heat/Defrost Door (Port 2) Vent/Heat Door (Port 4) Vacuum Source (Port 5)
Off V V V NV V
Vent NV NV NV V V
Heat NV V V NV V
Mix NV V NV NV V
Defrost NV NV NV NV V
Norm A/C NV NV NV V V
Max A/C V NV NV V V
Vacuum Hose Color Orange/Black Blue Yellow Red White


V = Vacuum
NV = No Vacuum



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cool! Wow.

 

cooler or hotter
'93

 

Ekmeian:

Make sure the fins are not on backwards or the motor is turning backwards.