SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 970 (CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS - (EXCEPT HYBRID))DIAGNOSTIC TESTSCLIMATE CONTROL SYSTEMPINPOINT TESTSPINPOINT TEST E: TEMPERATURE CONTROL IS INOPERATIVEPINPOINT TEST E: TEMPERATURE CONTROL IS INOPERATIVE
2010 Mercury Mariner Hybrid, AWD

Pinpoint Test E: Temperature Control Is Inoperative

2010 Mercury Mariner Hybrid, AWDSECTION Pinpoint Test E: Temperature Control Is Inoperative
WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. E1 CHECK THE HEATER TEMPERATURE CABLE SYSTEM 
    • Key in ON position.
    • Allow the engine to reach a normal operating temperature.
    • Set the function selector switch to the MAX A/C position. Adjust the temperature control switch to full COOL (left) and check for cool air discharge.
    • Adjust the temperature control switch to full WARM (right) and check for warm air discharge.
    • Vary the temperature control switch from full WARM to full COOL.
    • Did the air temperature change? 
    1. YES  : The system is fully functional.
    2. NO  : Go to  E2.
  2. E2 CHECK FOR A DISCONNECTED TEMPERATURE BLEND DOOR ACTUATOR CONTROL 
      Fig 1: Check Blend Door Actuator Control Cable Installation
      GF0025656Courtesy of FORD MOTOR CO.
    • Inspect the temperature blend door actuator control cable installation on the heater core housing. Verify that it is in mid-position, fully seated on the shaft and correctly located on the housing. Refer to CLIMATE CONTROL article.
    • Is the temperature blend door actuator control cable fully seated on the shaft, in the mid-position and correctly located on the housing? 
    1. YES  : Go to  E3.
    2. NO  : CONNECT the temperature blend door actuator control cable correctly. REFER to CLIMATE CONTROL article. TEST the system for normal operation.
  3. E3 CHECK THE TEMPERATURE BLEND DOOR ACTUATOR CONTROL CABLE OPERATION 
    • Rotate the temperature control switch from full WARM to full COOL while observing the heater temperature cable.
    • Is there corresponding movement from full warm to full cold between the temperature control switch and the heater temperature cable at the heater core housing? 
    1. YES  : INSTALL a new heater core housing due to a damaged air temperature blend door. REFER to CLIMATE CONTROL article. TEST the system for normal operation.
    2. NO  : Go to  E4.
  4. E4 CHECK THE TEMPERATURE CONTROL OPERATION 
      Fig 2: Check Temperature Blend Door Actuator Control Cable Installation
      GF0025657Courtesy of FORD MOTOR CO.
    • Inspect the temperature blend door actuator control cable installation on the temperature control switch.
    • Is the temperature blend door actuator control cable connected? 
    1. YES  : Go to  E5.
    2. NO  : CONNECT the temperature blend door actuator control cable. REFER to CLIMATE CONTROL article. TEST the system for normal operation.
  5. E5 CHECK THE TEMPERATURE CONTROL SWITCH 
    • Rotate the temperature control switch from full WARM to full COOL while observing the heater temperature cable.
    • Is there corresponding movement from full warm to full cold between the temperature control switch and the heater temperature cable at the temperature control switch? 
    1. YES  : INSTALL a new heater temperature cable. REFER to CLIMATE CONTROL article. TEST the system for normal operation.
    2. NO  : INSTALL a new temperature control switch. REFER to CLIMATE CONTROL article. TEST the system for normal operation.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.