2001 ford ranger heater control valve keeps breaking

On the intake manifold,

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to by pass a heater core just connect the two hoses to the heater core together with a connector and hose clamps.

If you are sure the engine is getting up to temperature then your problem will be a part called the electrically positioned blend door and or the little motor that moves the blend door. The blend door moves back and forth between the AC core and the heater core to provide a mix of hot and cold air or hot or just cold depending on what you set the air temperature control at, blue being cold and red being hotter. This is all to common a problem on Ford rangers and Explorers which share the same components of the heating and AC systems. When the door fails it is usually on the cold setting position. The kicker here is that you must remove the dash to replace the parts, the blend door and the blend door actuator motor should both be replaced at the same time, the common reason for the motor to fail is a sticking hard to move blend door due to warping of the plastic it is made from.

Flow is from engine to heater control valve to heater core back to engine. IE the hose with the valve is the heater IN,

check if both heater hoses going into firewall are hot.. if only one is hot then your heater core is stopped up..you can take both lines loose and take a water hose and back flush,,, force hose on one inlet of heater core for a minute and then the other.. keep going to you get a good flow...make sure heater valve is open, not just valve position take loose and confirm clear..last make sure your thermostat is not stuck open keeping engine from comming up to temperature

Check your heater control door and actuator. make sure they are operating properly. The doors are known to break,and the actuators can go bad. The a/c works on max because there is a heater control valve that shuts the coolant flow into the heater core.

let me assume you have a 4 port heater control valve (4 water ports and 1 vacuum line). I have fixed several and they only leak for a short time before the valve completely breaks and you lose all coolant immediately. (not good) The leak is caused by the elbow piece that threads into the control valve. The threads just deteriorate and come apart. this repair is very easy and can be done yourself for under $30 dollars by going to your local auto store and purchasing a new one. Im also going to assume its not a hose you were specific about the valve. I guess if you were in an emergency and needed a quick repair that may or may not work long you could always epoxy or cement the defective piece together but this wouldn't be recommended except in the case that it is (a) not your car and; you dont like the owner:-). I hope this helps
Lucas

that is correct your by-pass inlet is always on the right side of core

P1537 Intake Manifold Runner Control Stuck OpenThis is from www.obd-codes.com

Here is the TSB from Ford:


Here it is... TSB 03-22-10...

FORD: 1995-2001 EXPLORER
1995-2002 RANGER
1996-1997 AEROSTAR
2000-2002 EXPLORER SPORT
2001-2002 EXPLORER SPORT TRAC
MERCURY: 1997-2001 MOUNTAINEER


This article supersedes TSB's 03-11-9, 02-13-8 and 02-08-2 to update the model coverage.

ISSUE:
Some vehicles built prior to 12/1/2001 may exhibit the following shift and engagement conditions:

No 2nd Gear
No 3rd Gear
No Engine Braking In Manual 1st.
Out of specification pressures controlled by the transmission main control valve body separator plate may be the cause.

ACTION:
Verify the condition, the main control valve body separator plate may need to be updated to the latest level. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

CAUTION: A NEW SEPARATOR 7Z490 MUST BE USED WHEN INSTALLING THE SPECIAL SERVICE KIT 7M203 OR ADDITIONAL TRANSMISSION DAMAGE MAY OCCUR. REFER TO THE PARTS APPLICATION CHART IN THIS ARTICLE FOR CORRECT SEPARATOR PLATE PART LISTING.



NOTE: THIS ARTICLE DOES NOT APPLY TO ANY OTHER CONDITIONS OR COMPONENTS THAT MAY CAUSE SIMILAR SYMPTOMS AND IS ONLY WRITTEN TO COVER THESE SPECIFIC CONDITIONS.



NOTE: AN IN-LINE SERVICE FILTER IS NOT REQUIRED TO BE ADDED OR REPLACED FOR THIS TSB.



Verify that one or more of the following conditions exist.
Low Line Pressure While In Drive At WOT
No 2nd And/Or No 3rd Gear
No Engine Braking In Manual 1st
DTC P0732, P0733 Or P1762
Install Kit (3L5Z-7M203-JA) to update the main control valve body assembly, refer to the installation procedures found in the kit.
Reinstall the main control by continuing to follow the installation steps listed in the Workshop Manual, in-vehicle service, main control valve body.
After completing the procedure, verify the condition has been corrected.
Clear all DTCs.

Part Application Chart
Vehicle Application Engineering Description Qty. New Service Part Use on Transmission Application 7000 -Reference Only-
95/96 Models ONLY
95/97 Models Separator Plate to Case Gasket 1 2L5Z-7C155-AA ALL
95/97 Models Separator Plate to Main Control Gasket 1 2L5Z-7D100-BA ALL
95/96 Models - ALL Plate - Valve Body Separator 1 F5TZ-7A008-CA 95GT-AA/BA/CA/DA/EA/FA/ GA;96GT-BA/CADB/EB/FA/ GA/HA/KA/MA/NA
97 Models ONLY
97 2.3L Ranger Plate - Valve Body Separator 1 F77Z-7A008-AB 97GT-GC
97 3.0L OHV Ranger/Aerostar Plate - Valve Body Separator 1 F77Z-7A008-AB 97GT-EC/FC/MC/NC/RE/SE
97 4.0L OHV Ranger/Aerostar Plate - Valve Body Separator 1 F77Z-7A008-CB 97GT-KE/LE
97 4.0L OHV Explorer/Mountaineer Plate - Valve Body Separator 1 F77Z-7A008-DB 97GT-KF/LF
97 4.0L SOHC Explorer/Mountaineer Plate - Valve Body Separator 1 F77Z-7A008-EB 97GT-AE/BE
1998-2001 Models ONLY
98/01 2.5L Ranger Plate - Valve Body Separator 1 1L5Z-7Z490-DA 98GT-GA; XL5P-CA
98/00 3.0L Ranger Plate - Valve Body Separator 1 1L5Z-7Z490-EA 98GT-EB/FB; XL5P-AA/BA
98/00 4.0L - EI Ranger Plate - Valve Body Separator 1 1L5Z-7Z490-FA 98GT-KB/LB; XL5P-DA/EA/FA
98/00 4.0L - EI Explorer Plate - Valve Body Separator 1 1L5Z-7Z490-GA 98GT-CB/DB; XL2P- EA/FA
98/00 4.0L - SOHC Plate - Valve Body Separator 1 1L5Z-7Z490-HA 98GT-AA/BA; XL2P- CA/DA
2001-2002 Models ONLY
2001/2002 2.3L Ranger Plate - Valve Body Separator 1 1L5Z-7Z490-AA 1L5P-CA
2001/2002 3.0L Ranger Plate - Valve Body Separator 1 1L5Z-7Z490-BA 1L5P-AA/BA
2001/2002 4.0L-SOHC - ALL Plate - Valve Body Separator 1 1L5Z-7Z490-CA 1L5P-DA/EA
ALL MODELS
1995-2002 ALL as Listed Above Valve Body Service Kit 1 3L5Z-7M203-JA ALL