Low Heat From the Driver’s-Side Vent – 2012-2014 Honda CR-V

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A14-063
November 20, 2014
ATB 00239-01113 REV1 (1411)

Low Heat From the Driver’s-Side Vent

Supersedes 14-063, dated November 1, 2014, to revise the information highlighted in yellow.

 

AFFECTED VEHICLES

Year Model Trim VIN Range
2012 CR-V ALL All VINs beginning with 5J6, 2HK, and 3CZ
2013-14 CR-V ALL ALL

 

REVISION SUMMARY

Under step 10 of REPAIR PROCEDURE, a note was added.

 

SYMPTOM

The heat from the driver’s side-vent is lower than the heat from the front passenger’s-side vent.

 

POSSIBLE CAUSES

The vehicle’s heater core may be partially clogged, decreasing the heater performance on the driver’s side.

 

CORRECTIVE ACTION

Flush the heater core.

 

REQUIRED MATERIALS

Part Name Part Number Quantity
CLR Cleaner (56 oz per affected vehicle) Commercially Available 1
Genuine Honda Antifreeze / Coolant Type 2 (1 gallon) OL999-9011 Low Heat From the Driver’s-Side Vent - 2012-2014 Honda CR-V | small light 4 Gallons

 

TOOL INFORMATION

Part Name Tool Number Quantity
CR-V Heater Core Flush Kit VSB02C000038 1
Wayne ½ HP Pump Model PC4 Commercially Available 1

NOTE: Each dealer was sent one CR-V Heater Core Flush Kit and a Wayne ½ HP Pump Model PC4 in October 2014. Additional kits are available through the Honda Tool and Equipment Program at 888-424-6857.

 

WARRANTY CLAIM INFORMATION

The normal warranty applies.

Operation Number Description Flat Rate Time Template ID Failed Part Number
6110A2 Flush the heater core. 1.1 hours 14-063A 79115-T0G-A01

 

Defect Code:  05401
Symptom Code: 03220
Skill Level:  Repair Technician

 

INSPECTION PROCEDURE

  1. With all electrical components and the A/C turned off, start the engine and let it warm up to normal operating temperature (the cooling fans will cycle twice).
  2. Set the temperature to max heat and check the driver’s and front passenger’s vent temperatures with a thermometer.
    • If the temperature difference is more than 10 degrees, go to step 3.
    • If the temperature difference is less than 10 degrees, this bulletin does not apply. Have the service advisor explain to your customer that the small variation in vent temperature is normal.
  3. Do the Driver’s Air Mix Control Motor Test and the Passenger’s Air Mix Motor Test according to the electronic service manual.
    • If the air mix motors pass the tests, go to REPAIR PROCEDURE.
    • If either of the air mix motors fail the test, repair the problem according to the electronic service manual and recheck the vent temperatures. If the temperature difference is less than 10 degrees, this bulletin does not apply. Have the service advisor explain to your customer that the small variation in vent temperature is normal.

 

REPAIR PROCEDURE

  1. Wait until the engine is cool, then remove the radiator cap.
  2. Drain the coolant from the radiator.
  3. While the coolant is draining, assemble the CR-V Heater Core Flush Kit as shown below.

Heater Core Flush Kit

 

  1. After the coolant has drained, tighten the radiator drain plug securely.
  2. Disconnect the inlet and outlet heater hoses from the heater core. Do not disconnect the hoses from the engine side.  Fold the hoses out of the way.

NOTE: Mark the hoses to make sure they are reconnected properly.

Mark the hoses

 

  1. Connect the flush kit inlet hose and outlet hose to the heater core as shown.

Connect the flush kit inlet hose

 

  1. Mix 56 oz of CLR with 1 gallon of clean tap water in the provided bucket. Arrange the hoses as shown in the image below. Make sure the inlet hose is coiled along the bottom as shown to prevent it from suctioning the side or bottom of the bucket and preventing the cleaning solution from flowing.

NOTE: Carefully follow the precautions listed on the CLR container.

Mix 56 oz of CLR with 1 gallon of clean tap water

 

  1. Prime the pump before starting it by removing the bolt and adding a cup of water to the pump.

NOTE: Running the pump without priming will cause damage to the internal components of the pump. If the pump fails for any reason, the dealer is responsible for the cost of replacing the pump.

Prime the pump

 

  1. Start the pump. Make sure the solution is flowing by looking inside of the bucket and checking the filter attached to the pump’s inlet connector. You will see the CLR solution swirl inside the bucket.
  2. Allow the heater core flush to run for 1.5 hours, then turn off the pump.

NOTE: You do not have to be present when the heater core flush is running.

  1. Discard the used CLR / water mixture from the bucket according to your local regulations/guidelines.
  1. Clean the CLR solution from the heater core by flushing it with 30 gallons of clean tap water as follows:
  • Fill the second bucket (provided with the kit) and fill it with clean tap water.
  • Transfer the pump inlet hose to the bucket of clean tap water and leave the flush kit outlet hose inside the empty bucket (previously used to fill with CLR).
  • Run the flush kit until 30 gallons of clean tap water are cycled through the heater core.

Clean the CLR solution from the heater core

 

  1. Remove any remaining water from the heater core as follows:
    • Disconnect the flush kit inlet hose from the heater core inlet.
    • Apply compressed air into the heater core inlet with an air chuck until little or no water is coming out the outlet hose.

Apply compressed air into the heater core inlet

 

  1. Disconnect the flush kit outlet hose from the heater core.
  2. Reconnect the inlet and outlet heater hoses to the heater core.
  3. Fill the cooling system with new coolant.
  4. Loosely install the radiator cap.
  5. With all electrical components and the A/C turned off, start the engine and let it warm up to normal operating temperature (the cooling fans cycle twice).
  6. Turn the engine off and drain the coolant from the radiator.
  7. Refill the cooling system again with new coolant, including the coolant reservoir.
  8. Loosely install the radiator cap.
  9. With all electrical components and the A/C turned off, start the engine and let it warm up to normal operating temperature (the cooling fans cycle twice).
  10. Turn off the engine and tighten the radiator cap securely. Then, start the engine again and check for leaks.
  11. Check the coolant level in the coolant reservoir. Make sure it is between the MAX mark and MIN mark. If the coolant level in the coolant reservoir is at or below the MIN mark, add coolant to bring it between the MIN and MAX marks,
  12. Confirm the heater core is working properly by setting the temperature to max heat and checking the driver’s and front passenger’s vent temperatures with a thermometer.
    • If the temperature difference is more than 10 degrees, repeat the REPAIR PROCEDURE.
    • If the temperature difference is less than 10 degrees, the repair is complete.
  13. If the flush kit will not be used within 4 hours, remove any remaining water from the pump by removing the bolt mentioned in step 8. This will prevent corrosion inside of the pump.

END

 


 

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NHTSA ID Number: 10120775

Manufacturer Communication Number: Service Bulletin

Summary

Service bulletin – The heat from the driver?s side-vent is lower than the heat from the front passenger?s-side vent. The vehicle?s heater core may be partially clogged, decreasing the heater performance on the driver?s side.

 

1 Associated Document

Manufacturer Communications

A14-063
November 1, 2014
ATB 00239 (1410)

https://www.nhtsa.gov/recalls?nhtsaId=10120775

MC-10120775-9999.pdf 1671.774KB

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3 thoughts on “Low Heat From the Driver’s-Side Vent – 2012-2014 Honda CR-V”

  1. Hi Jaime, when you say Honda needs to repair this free of charge, does that mean they WILL or that they SHOULD if they had any integrity? The reason I ask is I just bought a 2014 CR-V with 35,000 miles on it and it’s blowing cold on the driver’s side but of course I didn’t buy the extended warranty. Thanks!

    Reply
  2. My 2014 CR-V has this problem at 34, 022 miles. This is a safety hazard as the driver side blows cool air and is not able to defrost the windshield. Honda needs to repair this free of charge see Service Bulletin 14-063. Warranty claim info Operation no. 6110A2 Flush heater core Template ID 14-063A Failed part no. 79115-T0G-A01.

    Reply

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