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Replacement AC Units for 2008 Fleetwood Fiesta 33L With Coleman AC  

Updated 10/05/2026 | Published 10/04/2026



Question:

I have a 2008 fleetwood fiesta 33L with two Coleman rooftop ac units and I think this Is the part number 863308796. I’m looking for replacement. What do you recommend

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Expert Reply:

Hey Timothy! Based on the 863308796 number, your existing Coleman Mach AC is a 13,500 Btu unit. Since your 2008 Fleetwood Fiesta has a ducted setup, I recommend replacing it with one of the new Advent Air complete systems. You can choose from the following:

-Advent Air RV AC System - 13,500 Btu - Single Zone - Ducted - White # ADV87QR

-Advent Air RV AC System - 13,500 Btu - Single Zone - Ducted - Black # ADV59QR

You could also upgrade to 15,500 Btu if you want some additional cooling capacity:

-Advent Air RV AC System - 15,500 Btu - Single Zone - Ducted - White # ADV99QR

-Advent Air RV AC System - 15,500 Btu - Single Zone - Ducted - Black # ADV69QR

These are complete systems, so you'll be replacing the older Coleman controls along with the rooftop unit instead of trying to adapt the new AC to the original components. Everything switched to R32 last year following EPA regulations, so the same is true for any replacement right now.

You can also add the 5,000 Btu Electric Heat Strip # ADV37QR for supplemental heat, and the optional Bluetooth Remote # ADV67QR lets you control the AC without having to use the wall thermostat.

Are you replacing both AC units or just one?

expert reply by:
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Robin H
ADV59QR
ADV59QR
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