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| TSB 14-0157 | WARM A/C OUTPUT – LACK OF BLOWER MOTOR OPERATION IN ONE OR MORE SPEED SETTINGS |
:
ISSUE:
Some 2008-2012 Escape and 2008-2011 Mariner vehicles equipped with electronic manual temperature control (EMTC) may exhibit a customer concern of warm A/C system output and/or lack of blower motor operation in one or more speed settings.
This may be due to a damaged blower motor resistor caused by water entering the heater core and evaporator core housing through the cowl.
This concern is sometimes misdiagnosed as a restriction in the A/C system as vehicles may exhibit abnormally high discharge and low suction pressures, erratic compressor and engine cooling fan operation, frosting of the suction line, and/or excessive amount of time for A/C system pressures to equalize after the vehicle is turned off.
ACTION:
Follow the Service Procedure steps to correct the condition.
SERVICE PROCEDURE
- Perform the blower motor resistor component check on the vehicle. Refer to Workshop Manual (WSM), Section 412-00.
- Are the resistance measurements observed within specification?
- Yes – this article does not apply. Refer to WSM, Section 412-00 for normal diagnosis.
- No – proceed to Step 3.
- Replace the blower motor resistor. Refer to WSM, Section 412-01. Proceed to Step 4.
- Remove the cowl panel grille. Refer to WSM, Section 501-02.
- Remove the excess foam seal material from around the inside of the leaf guard rain hat. (Figures 1 and 2)
Figure 1 – 14-0157
Figure 2 – 14-0157
- Liberally apply Motorcraft Ultra Silicone Sealant to the bottom of the leaf guard where the intake to the heater core and evaporator core housing meet. (Figure 3)
Figure 3 – 14-0157
- Cut away the forward corner of the rain hat to improve drainage. (Figures 4 and 5)
- (A) indicates front of vehicle.
Figure 4 – 14-0157
Figure 5 – 14-0157
- Reinstall cowl panel grille. Refer to WSM, Section 501-02.
- Replace the receiver drier. Refer to WSM, Section 412-01.
8L8Z-19C836-C  | Receiver Drier (Model Year 2008) |
| BL8Z-19C836-B | Receiver Drier (Model Years 2009–2012) |
| 3F2Z-18591-AA | Blower Motor Resistor |
| 9W7Z-19B596-A | Gasket Kit |
| TA-29 | Motorcraft Ultra Silicone Sealant |
| YN-12-D | Motorcraft PAG Refrigerant Compressor Oil |
| YN-19 | Motorcraft R-134a Refrigerant |
| OPERATION | DESCRIPTION | TIME |
|---|---|---|
| 140157A | 2008-2012 Escape, 2008-2011 Mariner: Diagnose And Replace The Blower Motor Resistor And The Receiver Drier Includes Time To Seal The Leaf Guard And Trim The Rain Hat (Do Not Use With Any Other Labor Operations) | 1.5 Hrs. |
WARRANTY STATUS
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage.
Warranty/ESP coverage limits/policies/prior approvals are not altered by a TSB. Warranty/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool.
DEALER CODING
| BASIC PART NO. | CONDITION CODE |
| 78211A70 | 42 |
