heated mirrors not working

[Tuscany]

Hey all just as the title states my heated mirrors aren't working. They don't get warm anymore and I'm curious as to why. The rest of the power mirrors work just not the defrost on them. Any obvious reasons I'm missing as to why this is happening? Thanks.

[ZMANN]

I can never tell if they are working untill it is cold outside and they defrost themselves

[Tuscany]

They didn't work this last winter thats why I know they aren't defrosting.

[Six0~Stroker]

Fuse.....

[ZMANN]

gots to start there LOL

[letitsno]

I think they temp controled also, I think.

[ZMANN]

I thought they were always on ..or was it on with defrost like my last truck ??

[Tuscany]

I checked the fuse multiple times.. Oh it got cold this winter trust me there was plenty of snow and ice to be melted off but never did because they wouldn't defrost.

[ZMANN]

Well I could see one failing although not common

I can't see two failing at the same time without it being wiring / fuse related

[Tuscany]

well here is the back story on that... It had both the factory heated power tow mirrors on it before last winter. I was driving me and my wife home from dinner one night in a storm and a tree branch fell and ripped the passenger mirror clean off the truck. I then ordered a new one and put it on and it worked fine just like the stock one. ( it was made by cool-vue) then out of no where the heated mirrors both stopped working.