RV AC Filter Care: Match the Ceiling Assembly Before You Clean
Start with the ceiling assembly, not the AC model number
Before you clean or replace anything, confirm which ceiling assembly you have. The filters used are determined by what ceiling assembly you have, not by the AC model number.
Always disconnect the power supply when working on the appliance.
Dometic mechanical-control assembly
Check the assembly: Look at the ceiling assembly: the controls are on the ADB, not on a wall thermostat; check the unit rating label against the manual’s listed Blizzard NXT, Brisk II, FreshJet 3/5, High Performance, and Penguin models; the ADB rating label is viewed through the filter opening.
The cited manual covers Blizzard NXT, Brisk II, FreshJet 3, FreshJet 5, High Performance, Penguin, and Penguin II models with the mechanical ADB. The ADB rating label is viewed through the filter opening.
Action: Remove the return-air grille and read the ADB rating label through the filter opening; remove the filter and wash it with warm water and soap.
Stop: Do not go on the roof or open the refrigerant circuit.
Coleman-Mach 6727 ceiling assembly
Check the assembly: Read the ceiling-assembly model-and-serial sticker on the ceiling plate, shown as Figure 4, not the rooftop base-pan label.
Action: Remove the selector and thermostat knobs, two shroud screws, the shroud, and the filters.
Stop: If the sticker or shroud does not match, stop.
Clean or replace, and how often
Check: Read the filter label and the maker’s maintenance wording, and check for a dirty or clogged filter.
Action: If the maker says clean, wash with warm water and soap and dry completely; if it says replace or change, fit the replacement named for the ceiling assembly; check at least every two weeks.
Stop: If the maker does not name the filter or the assembly is unmatched, stop.
A dirty or clogged filter can cause poor cooling. The manual says the filters should be cleaned or changed at least every two weeks.
What remains unknown
- The exact covered model list is not stated in the draft.
- Whether a 6759 shroud matches is not proven by the cited text.
- Replacement part number and exact filter type.
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