Need to replace front Hydro Hot register due to fan failure.
We have a 2006 Mtn Aire DP 4303. Looked under hood for access panel. None there. Cannot figure out how to access the register which is located deep beneath the dash. Also, when HVAC unit was replaced (Dometic Penquin) a new communication panel was installed. The Hydro Hot registers aren't recognized through the Duro Therm 5-button Comfort Control for zone two (the rear).
Haven't attempted any repair yet but would like some input on how to proceed on my DIY mission. Thanks.