Dometic ProHeat M-Series 25 ft Control/Switch Harness
The Dometic ProHeat 200410K is the factory 25-foot control/switch harness used with standard ProHeat M-Series diesel-fired coolant heaters.
ProHeat identifies the harness as:
Control/Switch Harness – 25 ft
It is part of the heater’s external electrical installation and provides the control-side wiring connection between the ProHeat heater and the vehicle’s heater control system.
Key Features
- Genuine Dometic ProHeat replacement harness
- Factory part number 200410K
- 25-foot harness length
- Designed for standard ProHeat M-Series heaters
- Used for the heater control/switch circuit
- Factory-terminated wiring harness
- Used in both 12V and 24V installations
- Included in standard M-Series installation kits
- Documented in both G-I and G-II M-Series parts catalogs
- Suitable for new installations or replacement of damaged control wiring
What the Control/Switch Harness Does
The 200410K carries the heater’s external control connection between the ProHeat system and the vehicle-side control wiring.
It is separate from the main power harness.
PH-200410K
- Control/switch circuit
- 25 ft long
- Used for heater control wiring
PH-200204K
- Main power connection
- 16 ft long
- Used for heater electrical power
Both harnesses are included in the standard ProHeat M-Series installation kits.
Included in ProHeat Installation Kits
ProHeat uses 200410K in both primary standard M-Series basic installation kits.
PK0306 – 12V Basic Installation Kit
Includes:
- 200204K power wire harness
- 200410K control wire harness
- 944900K coolant pump harness
- 12/24V rocker switch
- Exhaust components
- Fuel-line installation components
PK0304 – 24V Basic Installation Kit
Uses the same 200410K control wire harness.
Because the same part is specified in both installation kits, 200410K itself is not voltage-specific.
Compatibility
The current ProHeat G-II M-Series catalog covers standard heater configurations including:
- M50 – 12V / 24V
- M80 – 12V / 24V
- M90 – 12V / 24V
- M105 – 24V
- M125 – 24V
The 200410K harness is part of the common M-Series installation hardware documented for these standard heaters.
Legacy M-Series Compatibility
The earlier G-I ProHeat parts catalog also lists 200410K as the control wire harness in both the 12V and 24V basic installation kits.
That earlier catalog covers standard M50 and M80 G-I applications.
So this harness spans both:
- Legacy G-I M-Series
- Current G-II M-Series
For transit-bus or motor-coach applications, ProHeat notes that OEM-specific wiring and software may be used, so those installations should be verified before ordering.
Available Harness Lengths
ProHeat documents three control/switch harness lengths:
- 944556K – 1 ft
- 200410K – 25 ft
- 944567K – 50 ft
This makes PH-200410K the standard mid-length option for most conventional installations.
Related M-Series Wiring
The same factory harness section also lists:
- 944557K – Coolant Pump Harness, 1 ft
- 944900K – Coolant Pump Harness, 25 ft
- 944555K – Power Harness, 1 ft
- PH-200204K – Power Harness, 16 ft
- 944556K – Control/Switch Harness, 1 ft
- PH-200410K – Control/Switch Harness, 25 ft
- 944567K – Control/Switch Harness, 50 ft
- 944902K – AUX Harness, 16 ft
These harnesses serve different functions and should not be treated as interchangeable.
Installation Notes
When replacing or installing the control/switch harness:
- Shut the heater down completely
- Disconnect vehicle battery power before electrical service
- Inspect the PCM and vehicle-side connectors
- Route the harness away from exhaust components and hot surfaces
- Protect wiring from sharp edges and moving equipment
- Secure the harness to prevent abrasion
- Avoid excessive tension at connectors
- Verify the proper heater and vehicle control configuration
- Restore power and confirm proper heater ON/OFF operation after installation
ProHeat specifically instructs technicians to disconnect battery power before servicing heater electrical components.
Product Specifications
- BTRAC SKU: PH-200410K
- Manufacturer: Dometic ProHeat
- Manufacturer Part Number: 200410K
- Product Type: Control/Switch Wiring Harness
- Harness Length: 25 ft
- Heater Family: Standard ProHeat M-Series
- Legacy G-I Applications: M50 / M80
- Current G-II Applications: M50 / M80 / M90 / M105 / M125
- 12V Compatible: Yes
- 24V Compatible: Yes
- Included in PK0306: Yes
- Included in PK0304: Yes
- Variable M-Series: Not documented for this harness
- Application: Installation / replacement electrical component
Related ProHeat Parts
- PH-200204K – M-Series 16 ft Power Harness
- 944556K – M-Series 1 ft Control/Switch Harness
- 944567K – M-Series 50 ft Control/Switch Harness
- 944900K – M-Series 25 ft Coolant Pump Harness
- 944902K – M-Series 16 ft AUX Harness
- PK0306 – M-Series 12V Basic Installation Kit
- PK0304 – M-Series 24V Basic Installation Kit
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