9233A4551 Electric Heat Strip Kit for Coleman Mach Air Conditioners

In this review the 9233A4551 Electric Heat Strip Kit is evaluated as a practical add-on for RV owners with Coleman Mach Heat Ready ceiling assemblies who need supplemental heat while parked or during cool evenings. The bottom line: it is a straightforward heater accessory that adds about 5,600 BTU of warmth to compatible MACH 48xxx and 45xxx series air conditioners, and it is best for users who want a simple chill-chasing boost rather than a replacement for a furnace.

Key Features

• Compatibility: Designed to fit Coleman MACH 48xxx (Medium Profile) and 45xxx (Low Profile) Air Conditioners and Heat Pumps, so installation matches the intended ceiling assemblies.
• Heating Output: Provides an additional 5,600 BTU of heating output to help take the edge off cold starts and quick chill periods.
• Included Components: Ships with a heat/cool thermostat and a two-pin heater wire receptacle to make the installation smoother and reduce accessory hunting.
• Durable Materials: Constructed from materials treated for high-temperature resistance and anti-corrosion to extend service life in the RV environment.
• OEM Replacement: Replaces the original 9233-4551 assembly so it matches the factory fit and function of heat-ready ceiling units (except Mach 8).

Who It's For

This kit is for RV owners with Coleman Mach Heat Ready ceiling assemblies who want a quick way to add electric heat without modifying the RV structure or installing a separate furnace. It especially suits those who use their RV in mild to moderately cool weather and need a fast wind-down of chill from the cabin.

It is not intended for heavy-duty primary heating in cold climates or as a furnace replacement, so people who rely on electric heat as a sole heat source in very cold conditions should look for a dedicated heating system instead.

Pros & Cons

Pros

• Easy to install in compatible ceiling assemblies, and customers frequently praise the ease of installation.
• Provides immediate supplemental heat that helps chase away chills during cool evenings.
• Includes thermostat and wiring receptacle, which simplifies fitting and reduces extra purchases.
• Made with high-temperature resistant, anti-corrosion materials for longevity in RV use.

Cons

• The heat output receives mixed feedback; some users find it noticeably warm while others report minimal heat, so expectations should be tempered.
• Not a substitute for a furnace and may not be efficient for extended heating needs, with mixed reports on propane savings.

Specifications

Part Compatibility	Coleman MACH 48xxx and 45xxx series (except Mach 8)
Replacement Part	Replaces OEM 9233-4551
Heating Output	Approximately 5,600 BTU
Includes	Heat/cool thermostat and two-pin heater wire receptacle
Materials	High-temperature resistant and anti-corrosion treated components
Application	Heat Ready Ceiling Assemblies for RV air conditioners and heat pumps

Our Verdict

The 9233A4551 Electric Heat Strip Kit is a sensible, value-oriented option for RV owners who need a modest, reliable boost of heat from their Coleman MACH 48xxx or 45xxx series air conditioners. It is best for occasional use and quick chill removal, offering easy installation and factory-style replacement parts, but it should not be relied on as a primary heating source in very cold conditions.

Frequently Asked Questions

Will this fit my Coleman Mach ceiling assembly?
Yes, it is designed for Coleman MACH 48xxx (medium) and 45xxx (low) profile series that are heat-ready, but not for Mach 8 models.

How much heat does it add?
The kit adds about 5,600 BTU of heating output to your air conditioner to help remove quick chills.

Does it replace the OEM part?
Yes, the kit replaces the OEM 9233-4551 and includes a thermostat and two-pin receptacle to aid installation.