Furnace filter on 2011 Allegro?

[Howard Janin]

Hi!

We have a 2011 Allegro 32CA that we are getting ready for camping for 2016!

I have washed all of the ceiling return air filters for the A/C's but I would also like to clean or replace the filter for the furnace. Is there one and Where can I find it?

TIA


Howard Janin

[BFlinn181]

Most all RV furnaces don't have a filter because it might restrict air flow. You could check at the return grill in your RV, but I don't think you'll find anything. If you try to install a filter, the reduced air flow might cause the furnace to fail to work because there's a 'sail switch' in the furnace that won't trigger the furnace if air flow isn't strong enough to push it closed.

[garykk]

no filters on furnace

[Old-Biscuit]

No return air flow because it can restrict return air to furnace which can cause the heat exchanger to overheat........if overheated the high temp limit switch will trip furnace.

Also can cause issues trying to light off furnace due to lack of proper air flow.

RV Furnaces are marginal on air flow to begin with and doesn't take a lot to upset the required air flow