Blend Door replacement on 2010 f150
Looking for any opinions on issue I have a 2010 F150, about 3 weeks ago I noticed a "clicking" noise in the dash but only when the temperature portion of the temp control is all the way to max (high heat). When I turn the temperature down to the middle then back to heat no sound unless I go to the max portion again. It's a clicking noise.
Heat works fine other than when at max heat it clicks in the dash, A/C seems to work fine but its -20 here so I didn't leave it on for long.
Ford service says its a blend door and conveniently it's the blend door that will need dash removal and $1500 bucks to replace a $50 part.
Are they right? Or could I be getting screwed?