The Coleman Mach 37203-4551 (also known as 47233-4551) is an electric heat strip accessory designed exclusively for Coleman Mach 8 ultra-low profile rooftop air conditioners. When installed in a compatible "heat-ready" ceiling assembly, this heat kit adds 6,000 BTU of electric heating capacity – perfect for taking the edge off cool mornings without firing up your propane furnace.6,000 BTUMach 8 Only115V AC
Effective "chill chaser" heating
Standard shore power / generator
Easy installation in heat-ready assemblies
Limited manufacturer warranty
This heat strip is designed ONLY for Coleman Mach 8 ultra-low profile air conditioners (47xxx series). It will NOT work with: • Mach 3, Mach 10, Mach 15, or other Coleman AC models • Standard height/TSR units (48xxx/38xxx series) • Low profile units (45xxx/35xxx series) If you have a different Coleman AC model, you need heat strip 38203-4551 (also listed as 9233A4551), which provides 5,600 BTU for non-Mach 8 units.
This heat strip may be referenced by multiple part numbers: • 37203-4551 (current Airxcel/Coleman-Mach part number) • 47233-4551 (legacy part number) • 47233A4551 (alternate format) All of these refer to the same Mach 8 heat strip. If your documentation references any of these numbers, this is the correct part.
A "heat-ready" ceiling assembly is a Coleman-Mach interior ceiling unit that has the built-in wiring and controls to accept an optional electric heat strip. Not all ceiling assemblies are heat-ready. Your ceiling assembly must have:
If your ceiling assembly is not heat-ready, you would need to replace it with a compatible heat-ready assembly before adding this heat strip.
This heat strip is compatible with the following heat-ready ceiling assemblies: 8330-763 8330-7633 8330D735 8330E935 8430-6301 8430-635 8430A6301 8430A635 8530-6332 8530D735 8630-6352 8630A635 8630A63523 9430-4552 9430-4553 9430-4572 Check your ceiling assembly's model number to verify compatibility.
This heat strip is designed for Coleman Mach 8 rooftop units including: • 47201B876 – Mach 8 Cool Only • 47204B876 – Mach 8 Cool Only • 47223B879 – Mach 8 Heat Pump Generally compatible with all 47xxx series (ultra-low profile) units when paired with a heat-ready ceiling assembly.
This electric heat strip is designed as a "chill chaser" – it's intended to take the edge off cool mornings or evenings when the temperature is just a few degrees too cold for comfort. It is NOT a substitute for your RV's propane furnace. Best used for: • Taking the chill out of the air on cool mornings • Mild temperature adjustment without running the furnace • Shoulder season camping when full heat isn't needed Not recommended for: • Cold weather camping where significant heating is required • Replacing your furnace as primary heat source
Installing the heat strip in a heat-ready ceiling assembly is relatively straightforward:
Note: Refer to Coleman-Mach installation instructions for complete details. If you're not comfortable with electrical work, have a qualified RV technician perform the installation.
• 48xxx series (Standard/Medium Profile) • 45xxx series (Low Profile) • 38xxx series (TSR) • 35xxx series (Mach 10) • Mach 3, Mach 15, or other models For these units, use heat strip 38203-4551
Note: Thermostat/control panel and heat-ready ceiling assembly are NOT included. Heat strip requires a compatible heat-ready ceiling assembly for installation.
Manufacturer: Coleman-Mach (Airxcel) Support: coleman-mach.com Phone: 1-316-832-3400 Warranty: 2 Years Limited