RAM 2500 – Code B11FC

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birchit

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Hi guys,

my RAM 2500 2015 Power Wagon has a issue with the HVAC and letting no warm air to the passengers.

Can you help? CODE B11FC - how can I fix this air flap sensor, and where is its position? I have the shop/repair manual, but I can't find the position or anything else about this sensor.

- AC works
- Cold works
- Vents works, because it react when I change from the floor to the window or directly on the passenger
- Fan works
- Circulating air works
- Thermostate works
- Cooling system works
- Hoses are okay and warm directly at the heat exchanger
- Flushed the colling system
- Did I forgot something?

I have no further idea what I should check. When I shut of the fan I feel that the warm air which cannot come through will be stopped somehow. Is that a tempature signal thing of the sensor? Who had this same problem already or can help?

Thanks guys!!!!
 

olyelr

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Sounds like your heater core may be clogged.
 
OP
OP
B

birchit

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Damn, that could be. But this will be big work to replace, right?

Thanks, olyelr!
 

olyelr

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Start by backflushing the heater core and see if that fixes your issue.
 

GTyankee

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does heat get to the DRIVERS Side ?

I have only been able to find 2 similar codes

B11FC-11 - Blend Air Sensor Circuit-Short-to-Ground
B11FC-12 - Blend Air Sensor Short-to-Battery
 

markabby

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might be an easy fix...son had a similar issue on a durango...it was a bad mixing valve on passenger side. on his it was a small round module that would open or close for heat or cooling. On his it was easily accessible via under the dash near the floorboard.

He had a/c on drivers side, while heat came out of passenger side.

at least look at that before you go pulling a heater core
 

EastWestHemi

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I’d just be happy it’s the heater core, the contractor installing my floors pulled into my driveway with a top of the line 2019 Chevy 1500 and dropped 2 quarts of oil on my concrete driveway. Catastrophic rear main seal failure just out of warranty. All brands have problems.
 
OP
OP
B

birchit

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2015 Power Wagon
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Hemi 6.4l
does heat get to the DRIVERS Side ?

I have only been able to find 2 similar codes

B11FC-11 - Blend Air Sensor Circuit-Short-to-Ground
B11FC-12 - Blend Air Sensor Short-to-Battery
No, not the driver side and the passenger side!
 
OP
OP
B

birchit

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2015 Power Wagon
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Hemi 6.4l
might be an easy fix...son had a similar issue on a durango...it was a bad mixing valve on passenger side. on his it was a small round module that would open or close for heat or cooling. On his it was easily accessible via under the dash near the floorboard.

He had a/c on drivers side, while heat came out of passenger side.

at least look at that before you go pulling a heater core
Thanks. But I have no heat on both sides. Everything works correctly but only the heat doesn't get through into the passender room.
 

GTyankee

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When you grab the 2 hoses that go through into the cabin,
one should be quite hot, the other should be a bit cooler.
like what the guys mentioned in the videos
 
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