22142 Ignitor Assembly ST-12E OEM Replacement for Mr Heater, HeatStar, DeWalt Forced-Air Kerosene & Diesel Heaters

The 22142 Ignitor Assembly, also known as the ST-12E Ignition Transformer, is an original equipment manufacturer replacement component used in a wide range of forced-air kerosene and diesel heaters produced by Mr Heater, HeatStar, and DeWalt. This 120-volt ignitor generates the high-voltage spark required to ignite the fuel-air mixture, ensuring dependable start-up and consistent operation in demanding environments.

Built to OEM specifications, the 22142 restores factory performance, reliability, and safety.

Designed for quick installation and long service life, the ST-12E features heavy-duty wiring leads, insulated high-voltage output, and a grounded steel housing for secure mounting.

Using a genuine OEM ignitor assembly helps maintain proper ignition voltage, safe grounding, and efficient combustion in portable heating units.

Compatible Models - All Enerco heater models produced after 2005 use the 22142 ST-12E Ignitor

The Enerco 22142 Ignitor Assembly ST-12E is known to properly fit and function with the following partial list forced-air kerosene & diesel heaters:

• Mr Heater MH50KR
• Mr Heater MH75KTR
• Mr Heater MH125KTR
• Mr Heater MH175KTR
• Mr Heater MH210KTR
  
  
• HeatStar HS50K
• HeatStar HS75KT
• HeatStar HS125KT
• HeatStar HS175KT
• HeatStar HS210KT
  
  
• DeWalt All DXH Series DeWalt kerosene and Diesel fired portable heaters
  
  

Additional compatibility may exist for other brands and models manufactured using the same Ignitor Assembly.
Always verify compatibility by confirming your unit’s model number and part diagram.

Key Features

• OEM 120 V Ignitor Assembly engineered for Mr Heater, HeatStar, and DeWalt portable forced-air heaters
• Generates a consistent, high-voltage spark for reliable ignition
• Durable construction with factory-terminated leads for easy installation
• Ensures efficient combustion and dependable cold-weather starts
• Manufactured to original equipment specifications for long-term reliability

Technical Data

• Part Number: 22142 (ST-12E)
• Voltage Input: 120 Volts AC @ 60 Hz
• Spark Output: Approximately 12 kV
• Primary Connections: Power leads and ground 1 Black 21 inch lead with 1/4 Female push on connector.
• Secondary Connection: High-voltage output lead to electrode
• Typical Applications: 50 K–185 K BTU forced-air kerosene/diesel heaters (verify per model)

Dimensions

Height: 2.24 in.

Width: 3.0 in.

Depth: 2.44 in.

Base Mounts Center to Center: 2.68 in.

Height at Center Divots: 1.72 in.

Installation Notes

Disconnect the heater from all power sources before service. Mount the new ignitor securely on a clean, grounded surface using the existing hardware. Route the wiring leads to match the original configuration, keeping all cables clear of sharp edges and hot surfaces. Connect primary power, ground, and high-voltage leads per the manufacturer’s wiring diagram. After installation, verify spark performance and heater ignition sequence. Always follow the appliance’s installation and service manual to ensure safe operation.

Meta Title

22142 Ignitor Assembly ST-12E – OEM Replacement for Mr Heater, HeatStar & DeWalt Forced-Air Heaters

Meta Description

OEM 22142 (ST-12E) Ignitor Assembly for Mr Heater, HeatStar & DeWalt forced-air kerosene/diesel heaters. 120 V ignition transformer restores reliable spark and safe start-up performance.

URL Key

22142-st12e-ignitor-assembly-oem-replacement-mr-heater-heatstar-dewalt

The 22142 ignitor transformer is a Mr Heater ignitor assembly Model ST-12E from Enerco Group Cleveland Ohio that is used for DeWalt, Mr. Heater, and Heatstar kerosene heaters.

This 120 Volt Ignitor assembly 22142 is used in 50K, 75K, 135K, and 185K BTU heaters.

Specifications of the Enerco Group 22142 Ignitor Assembly

• Input: 120 Volts, 60Hz. , 0.36A.
• Output: 12 KV.


• Primary Lead: 1 Black 21 inch lead with 1/4 Female push on connector.
• Power Leads: 2 Red 14 inch leads with 1/4 Female push on connectors
• Ground Lead: 1 Green 14 inch lead with 3/16 round ground terminal.



Dimensions

Height: 2.24 in.

Width: 3.0 in.

Depth: 2.44 in.

Base Mounts Center to Center: 2.68 in.

Height at Center Divots: 1.72 in.