Audi Tech Tip: Passenger Compartment Not Warming Up?

Audi Tech Tip: Passenger Compartment Not Warming Up?

Code B10D004 will indicate a coolant circulation pump failure.

Models: 

A6/A7: 2012-2015 

A8/S8/S8+: 2014-2017

Bulletin: 191790

The customer may complain of a lack of heat in the passenger compartment even if the vehicle has been running for a long period. In the Climatronic control module, one or two DTC codes will be present. Code B10D004 will indicate a coolant circulation pump failure.

Code B11D501 indicates the supply voltage for terminal 30 of the coolant circulation pump has an electrical fault. 

To remedy the problem, the V50 coolant circulation pump needs to be replaced. 

You May Also Like

Cooling System Leak Testing

What replaces the conventional water pump and thermostat is electronic thermostats and electric water pumps.

A conventional thermostat and water pump are similar to a carburetor and mechanical fuel pump in one regard – they can only respond to change, not be proactive in their engine management. 

A carburetor and mechanical pump can only respond to throttle and engine speed and vacuum signals. Like the carburetor, a conventional thermostat and water pump can only react to changes in temperature. 

Mini Cooper Water Pump Service

The water pump is turned by a metal wheel driven by the crankshaft pulley.

Cavitation: Killer Of Water Pumps

The condition of the coolant has a direct relationship to cavitation in pumps.

Curing Springtime Air Conditioning Smells

Air conditioning scents can come from a host of things.

Could Your A/C Recycling and Recovery Machine Be Overcharging?

The amount of refrigerant required by vehicle A/C systems has decreased during the past two decades.

Other Posts

Solving Intermittent Overheating

New cooling systems anticipate and influence changes in coolant temperature.

Spark Plug Fouling

Understanding why spark plugs get dirty.

PCV System DTC

PCV systems are far more complex now, but they are also much better at controlling crankcase pressure.

Fuel Trims

To gain a better perspective on fuel trims, think about how “analog” vehicles dealt with changing fuel and air mixtures.