This is the genuine OEM heating element -- also known as a heat strip -- designed specifically for Coleman Mach 10 International Series rooftop air conditioners. When your RV's electric heat function stops working, this is the direct-fit replacement that restores it without guesswork or fabrication.
The Coleman Mach 10 International Series is one of the most widely installed rooftop RV AC units on the market, and its integrated electric heat strip is a popular feature for shoulder-season camping. Over time, heat strips can fail due to repeated thermal cycling, voltage spikes, or simple age. Part 45303-4551 is the factory-correct replacement -- same wattage, same mounting configuration, same terminal connections as the original.
Using the correct OEM part matters here. An undersized or mismatched heating element can trip breakers, damage the control board, or void your unit's service warranty. This element is built to Coleman Mach tolerances and drops into the existing bracket without modification.
Matches original wattage, mounting pattern, and terminal type for the Mach 10 International Series.
Restores electric heat strip function for cool mornings and evenings without running a separate heater.
Manufactured to Coleman Mach specifications -- not a generic aftermarket substitute.
Designed to be replaced in the field by a qualified RV technician or experienced DIYer.
A heat strip (electric heating element) is a resistive wire coil mounted inside the air handler section of a rooftop AC unit. When the thermostat calls for heat, 120V AC power flows through the element, which heats up and warms the air passing over it before it enters the cabin. It is not a heat pump -- it does not move heat from outside; it generates heat electrically, similar to a toaster coil. This makes it most effective in mild weather (above approximately 40 deg F) and most efficient when shore power is available at the campsite.
This heating element is designed for the Coleman Mach 10 International Series rooftop air conditioner. The Mach 10 International Series is identified by its sleek low-profile shroud and is commonly found on fifth wheels, Class A motorhomes, and travel trailers from a wide range of manufacturers. If you are unsure of your unit's model, check the label inside the return air grille or on the side of the rooftop unit -- the full model number will be printed there.
The Mach 10 International Series includes multiple BTU ratings and configurations. The heating element part number 45303-4551 is specific to certain configurations within this family. Verify your existing unit's model number against Coleman Mach's compatibility list or contact your dealer to confirm this element matches your specific unit before installation.
Replacing the heating element requires removing the interior air handler cover, disconnecting the wiring harness from the failed element, unbolting the element from its bracket, and reversing the process with the new part. Shore power must be disconnected at the pedestal or breaker before beginning any work inside the air handler. This is a 120V component -- treat it with the same precautions as any household electrical work.
Always disconnect shore power and confirm voltage is absent with a meter before handling the heating element or its wiring. The heat strip operates at 120V AC. Working on a live circuit risks serious injury. If you are not comfortable with 120V electrical work, have a qualified RV technician perform this service.