B1000 Code failures by brands


Description of DTC code B1000

The air conditioner heater control has several switches or knobs that are used to regulate the system's performance. There are generally three types of switches, which are used depending on the setting or design of the system. These include momentary push button switches that are normally open or in the off position. Besides, there are rotary or multi-function switches that have various positions and potentiometers. They are rotary variable resistors used for more accurate control.

DTC B1000 OBDII is a specific code for Chrysler, Dodge, Jeep, and Ram. They are brands that relate to an A/C switch failure. When the code is set, it is because the control switch or potentiometer is stuck in an On position or out of calibrated range. But if the code is stored, it is because the switch was stuck in the On position or out of calibrated range, then, it returns to its normal state.

Symptoms of fault code B1000

  • Check Engine light ON.
  • Wrong operation of the air conditioning.
  • The A/C does not work at all.

Causes of OBD2 B1000

The B1000 OBD2 diagnostic code is set for one of the following reasons:

  • Wires or connectors related to the air conditioning switch may be damaged.
  • The A/C switch circuit may be faulty, resulting in a short.
  • The air conditioning switch may be broken.
  • The air conditioner heater control may be damaged.

Possible solutions of the DTC code B1000

To troubleshoot the B1000 OBDII fault code, you must do the following:

  • First, consult the Technical Service Bulletins.
  • Check all the wiring and connectors associated with the air conditioner switch for common damage. If you detect burns, wear, or corrosion, make repairs.
  • Check there are no deficiencies in the A/C switch circuit that produce a short or open circuit. The voltages of this circuit must match those specified by the manufacturer, otherwise, proceed with the applicable corrections.
  • Check the A/C switch for damage. To do so, follow the manufacturer's recommended diagnostic steps. If damage to the switch is found, consider replacing it.


Codes related to B1000

Leave a Reply

Your email address will not be published.