09-30-2012, 09:00 AM
The way I understand the filterminders is it is basically a vacuum gauge and shows the increased vacuum as the filter "fills up". This should give you an indication of when to change the filter. The dirtier the filter is the less air it allows to pass making the vacuum increase. Clear as mud?
Forest & Cindy Olivier
1987 log cabin
2011 Roadtrek C210P
PO 1999 Foretravel 36'
1998 Newell 45' #486
1993 Newell 39' #337