question: before buying a vacuum cleaner element in 1214 specify all your options, equipment, appearance and warranty from the seller. please note that we are not engaged in the sale and manufacture warranty.
Capitalize this past sentence correctly.
A: Before buying a vacuum cleaner Element in 1214 specify all your options, equipment, appearance and warranty from the seller. Please note that we are not engaged in the sale and manufacture warranty.

question: convert ordinary links on your website into income earning links. see the page above for more on how to change your ordinary links into affiliate links that have the potential to make money.
Capitalize this past sentence correctly.
A: Convert ordinary links on your website into income earning links. See the page above for more on how to change your ordinary links into affiliate links that have the potential to make money.

question: this functions as a code lock which opens the door after entry of a certain number combination.
Capitalize this past sentence correctly.
A: This functions as a code lock which opens the door after entry of a certain number combination.