2007-2009 Sprinter 2500 & 3500 Temp Control: Solving Failures and Part Number Puzzles
This guide decodes the common failures and critical part number differences for the HVAC temp control unit in 2007-2009 Dodge Sprinter 2500 and 3500 vans.
- You MUST match the OEM part number from your original unit. Different rear HVAC options use different controllers with incompatible plugs.
- This part is plug-and-play and does not require dealer programming for 2007-2009 models.
- Symptoms like erratic fan speed or incorrect temperatures can be caused by other, more common parts like the blower motor resistor or blend door actuators. Diagnose carefully before replacing the control unit.
- The Dodge Sprinter is a rebadged Mercedes, so parts with Mercedes-Benz numbers are often correct and interchangeable if the number matches.
Symptoms of a Failing Temp Control Unit
A faulty temp control unit in a 2007-2009 Dodge Sprinter 2500 or 3500 can cause a variety of confusing symptoms. Because the module is the central command for the entire HVAC system, its failure can mimic problems with other components. Watch for these common signs:
- Incorrect Temperature Output: The system blows hot air when you want cold, or cold air when you want heat. This can happen if the module fails to properly signal the blend door actuators that mix air from the heater core and A/C evaporator.
- Air Blows from Wrong Vents: You select the dash vents, but air only comes out at the floor or defrost. This indicates the module is not correctly commanding the mode door actuators.
- Unresponsive or Erratic Fan Speed: The fan may be stuck on one speed (often high), not work at all, or fail to change speeds when you turn the dial. While this is a classic symptom of a bad blower motor resistor, a faulty control unit can also be the cause.
- Intermittent Operation: The entire HVAC system may work one minute and shut off the next. Sometimes, turning the vehicle off and on again can temporarily restore function. This often points to an internal electrical issue, like a cracked solder joint on a circuit board relay.
- Dead Control Panel: The buttons and dials do not respond, and the backlighting or indicator lights are off. This suggests a complete loss of power to the module or total internal failure.
- A/C Compressor Won't Engage: The module sends the signal to the A/C compressor clutch to engage. If the module is faulty, it may not send this signal, even if the rest of the A/C system (refrigerant, compressor) is fine.
Known Issues for 2007-2009 Dodge Sprinters
The 2007-2009 Dodge Sprinter 2500 and 3500 are part of the NCV3 generation, which are rebadged Mercedes-Benz Sprinters. This means that many parts, including the temp control unit, are identical to their Mercedes counterparts and will use Mercedes-Benz part numbers.
No specific recalls or Technical Service Bulletins (TSBs) have been issued by the NHTSA for the HVAC temp control unit on these specific models. The most prominent recalls for this era concern Takata airbag inflators. However, owner forums frequently discuss internal electronic failures of the control unit, sometimes repairable by re-soldering cracked joints on the internal circuit board.
Compatibility Warning: The biggest issue for this part is ensuring you get the correct version for your van's specific options. There are different control units for models with and without rear passenger compartment heating and air conditioning. Using the wrong one can result in incompatible electrical connectors or non-functional rear climate systems.
Buying a Used Temp Control: The Definitive Checklist
A used OEM temp control unit is an excellent, cost-effective solution, especially since some new OEM parts are discontinued. However, careful verification is essential to avoid buying an incompatible part.
Step 1: Identify Your Sprinter's HVAC Options
Before you shop, know exactly what system your van has. Does it have standard front-only climate control? Does it have rear air conditioning? Does it have rear air conditioning and rear floor heat? The configuration of your van's HVAC system is the single most important factor in determining the correct part.
Step 2: Match the OEM Part Number EXACTLY
This is the most critical step. Because of the variations, you must match the part number from your original unit. Remove your existing unit first to get the number directly off the sticker. Do not rely on a visual match alone.
| Known Part Numbers | Manufacturer | Notes |
|---|---|---|
| 68012690AA | Dodge / Mopar | Commonly cited for models with rear passenger compartment heating. May be discontinued. |
| A9068200405 | Mercedes-Benz | Often interchangeable with 68012690AA. Match this for models with rear heat. |
| 68012690AB | Dodge / Mopar | Variant part number. Always verify against your original. |
| 0004463428 | Mercedes-Benz | Variant part number. Always verify against your original. |
| 68012691AA | Mopar | Variant part number. Always verify against your original. |
The electrical connectors on the back of these units differ based on the vehicle's options. Matching the part number is the only way to guarantee the plugs will fit and all functions will work as intended.
Step 3: Physical Inspection
When inspecting a used unit, check for:
- Intact Connectors: Look at the back of the unit. Ensure the plastic connector housings are not cracked and that all pins are straight and free of corrosion.
- Button and Knob Feel: Press the buttons and turn the knobs. They should move freely without sticking and have a consistent feel.
- No Physical Damage: Check the housing for cracks or signs of being dropped. Ensure the mounting tabs are intact.
Replacement Overview
Replacing the temp control unit is a relatively simple job that most DIY mechanics can complete.
- Difficulty: 2 out of 5
- Estimated Time: 30 minutes
- Tools Needed: Plastic trim removal tool, T20 or T25 Torx screwdriver.
Basic Steps:
- Disconnect the negative battery terminal to be safe.
- Using a plastic pry tool, carefully remove the center dash trim piece that surrounds the radio and HVAC controls. It is held in by clips.
- Remove the four Torx screws holding the control unit in place.
- Gently pull the unit out and disconnect the electrical connectors from the back.
- Connect the new unit, reinstall the screws and trim, and reconnect the battery.
Pro Tip: No special programming or calibration is required when replacing this control unit. It is a plug-and-play component.
Cost Comparison: Sprinter Temp Control
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New OEM | $600 - $900+ | May be discontinued or difficult to find. |
| New Aftermarket | $150 - $650 | Wide range of quality and features. Ensure compatibility. |
| Used OEM | $75 - $250 | Cost-effective, but requires careful part number matching. |
| Remanufactured/Repair Service | $300 - $400 | Your original unit is repaired and sent back. |
| Shop Labor | $125 - $185 | Typically 1 hour of labor for diagnosis and replacement. |
Frequently Asked Questions (FAQ)
Can I use a temp control from a Mercedes Sprinter in my Dodge Sprinter?
Yes. The 2007-2009 Dodge Sprinter is a rebadged Mercedes-Benz Sprinter. As long as the part number and vehicle options match, the parts are interchangeable.
My fan only works on the highest speed. Is the temp control bad?
This is a classic symptom of a failed blower motor resistor, which is a much more common and cheaper part to fail. The resistor controls the fan speeds, and when it fails, power bypasses it and goes directly to the motor, resulting in only the highest speed working. While a bad control unit can cause fan issues, you should always check the blower motor resistor first.
Do I need to have a new temp control unit programmed by the dealer?
No. For the 2007-2009 Sprinter, the temp control unit is a plug-and-play module. It does not require any special programming or calibration after installation.
Why are there so many different part numbers?
The different part numbers correspond to the various HVAC systems offered in the Sprinter. The main variations depend on whether the van is equipped with rear air conditioning and/or rear heating. Each configuration requires a slightly different control unit with the correct internal logic and external connections to operate the full system. This is why matching your original part number is essential.
Technical Specifications
OEM Part Numbers: 68012690AA 68012690AB 0004463428 9068200405 A9068200405 68012691AA
Requires T20 or T25 Torx bit for removal.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Dodge Sprinter 2500:
- Dodge Sprinter 3500:
- Symptoms of a Failing Temp Control Unit
- Known Issues for 2007-2009 Dodge Sprinters
- Buying a Used Temp Control: The Definitive Checklist
- Step 1: Identify Your Sprinter's HVAC Options
- Step 2: Match the OEM Part Number EXACTLY
- Step 3: Physical Inspection
- Replacement Overview
- Cost Comparison: Sprinter Temp Control
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off