B13F2

Code

LAND ROVER B — Body

Left - Auxiliary climate control - Temperature mixing motor

Brand: LAND ROVER

Type: B — Body

Views: UK: 15 EN: 21 RU: 16

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Failed/failed motor or internal actuator electronics
Damaged, corroded, or disconnected connector/wiring (open/short)
Poor ground or supply voltage to the actuator
Mechanically seized/blunted blend door or gears
Water ingress or debris in actuator or HVAC housing
Faulty climate control module or software/calibration error

Symptoms

Left auxiliary (rear/driver-side auxiliary) temperature cannot be adjusted or remains at one temperature
Incorrect temperature at left vent regardless of controls
Audible clicking, grinding or no sound when actuator should move
One-zone/dual-zone/aux climate zone behaves incorrectly or stuck
B13F2 stored in HVAC module and may illuminate a climate system warning

What to check

Read and record DTC(s) and freeze frame with a capable scan tool; clear and attempt to re-create the fault
Verify fuses and battery voltage while HVAC is operating
Visually inspect connector and wiring at the left auxiliary temperature actuator for corrosion, damage, or loose pins
Command the actuator through diagnostic tool and listen/observe movement
Check for mechanical binding of the blend door and inspect actuator gear teeth
Measure voltage and ground at actuator connector while commanding movement

Signal parameters

Supply voltage to actuator: approximately battery voltage (typically ~11–14 V) when powered
Ground return: low resistance to chassis ground with engine on and HVAC on
Position feedback (if equipped): analog voltage typically 0–5 V corresponding to actuator position
Control signal (if PWM-driven): variable duty cycle or frequency from HVAC module; duty cycle should change when commanding different positions
Actuator motor resistance (DC motors): typically low ohms; an open or very high resistance suggests motor windings open

Diagnostic algorithm

Retrieve stored codes, note conditions and history, then clear codes and attempt to reproduce.
With a scan tool, command the left auxiliary temperature actuator through full range. Observe movement, listen for noises, and note any lack of response or incorrect position feedback.
Inspect the actuator connector and wiring harness for corrosion, water ingress, broken pins, or chafing. Wiggle test wiring while commanding actuator to look for intermittent faults.
Backprobe actuator connector while commanding: verify battery supply voltage to the power terminal, verify ground continuity, and monitor any feedback/position signal for valid changing voltage.
If no power or ground is present, trace wiring back to fuse/relay and HVAC control module; check relevant fuse(s) and grounds.
If power/ground are present but actuator does not move, remove actuator and bench-test carefully: apply controlled 12 V supply or use a diagnostic actuator test per manufacturer procedure. Do not exceed safe test duration.
Inspect actuator for stripped gears, seized mechanism, or contamination. Replace actuator if mechanical damage or motor failure is found.
If actuator works on bench and wiring/power are good, suspect control module output or intermittent wiring. Check continuity between actuator connector and module pins; repair as required.
After repair or replacement, perform actuator relearn/calibration if required by the vehicle manufacturer, clear codes and verify proper function across temperature settings and drive cycles.
If fault persists despite a known-good actuator and wiring, consider HVAC/control module diagnostics or software update at a dealer-level tool.

Likely causes

Actuator motor or internal potentiometer/position sensor failed
Wiring harness connector corrosion or broken wires at actuator
Mechanical binding of blend door or stripped actuator gears
HVAC control module output driver fault (less common)
Blown fuse or poor battery supply to HVAC circuit

Fault status

⚠️ Status

Left auxiliary climate control temperature mixing motor circuit fault — actuator not responding or feedback invalid. Inspect actuator, wiring, power/ground, and HVAC module.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

Repair manuals

Manual library for LAND ROVER

413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

Your experience will help others

+100 karma for a short comment :)

Was this AI description helpful?

Your feedback helps improve AI descriptions.

👍 Like 0 👎 Dislike 0

Send to email

B13F2 — Left - Auxiliary climate control - Temperature mixing motor