Warm A/C Output – Lack of Blower Motor Operation in one or More Speed Settings – 2008-2012 Ford Escape & 2008-2011 Mercury Mariner

FORD:	2008-2012 Escape
MERCURY:	2008-2011 Mariner

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

1. Perform the blower motor resistor component check on the vehicle. Refer to Workshop Manual (WSM), Section 412-00.
2. Are the resistance measurements observed within specification?
   1. Yes – this article does not apply. Refer to WSM, Section 412-00 for normal diagnosis.
   2. No – proceed to Step 3.
3. Replace the blower motor resistor. Refer to WSM, Section 412-01. Proceed to Step 4.
4. Remove the cowl panel grille. Refer to WSM, Section 501-02.
5. 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

6. 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

7. Cut away the forward corner of the rain hat to improve drainage. (Figures 4 and 5)
   1. (A) indicates front of vehicle.

Figure 4 – 14-0157

Figure 5 – 14-0157

8. Reinstall cowl panel grille. Refer to WSM, Section 501-02.
9. Replace the receiver drier. Refer to WSM, Section 412-01.

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3F2Z-18591-AA No products found.	Blower Motor Resistor
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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.

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