If you only have intake/exhaust plates on outside then you have to access from inside the RV. Remove front grill. Then pull furnace
If you have an access panel on outside of RV.remove the panel screws to access furnace
ON EDIT:
From the outside.....license plate is mounted on furnace access panel
Is it time for your medication or mine?
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31