What are you trying to keep?
Perhaps the existing handle is comfortable, matches the other doors or fits a particular opening. Say that before discussing replacement. The lock's condition and the availability of suitable parts affect what can stay.
With lock repair, the useful question is what makes the entrance unreliable. A key may be worn, a component may be loose or the door may not meet the frame consistently. The repair should relate to the fault rather than simply substitute a new-looking part.
A different key arrangement
There may be nothing wrong with the hardware. You may want to retire a key or make compatible entrances work with fewer keys. Rekeying is worth considering for suitable locks, while keeping a storage area or another door separate if that suits the way the place is used.
For an electronic lock, understand which functions operate at the door and which depend on an account or other equipment. Changing a mechanical key does not transfer those accounts or automatically update codes. Use the manufacturer's appropriate process and keep access details private.
When a car key becomes unreliable
An intermittent remote button and a car failing to recognize a key are useful descriptions of different functions. Mention whether another known working key behaves the same way. A no-start fault can have causes beyond the key system.
Before buying another part, review automotive locksmith options and check the vehicle specification. If the key has physically broken, keep the pieces and avoid forcing a fragment in a lock. There is no need to arrive with a technical diagnosis.
Lake Nona is an Orlando area
The City of Orlando publishes separate neighborhood maps for Lake Nona Central, Estates, South and North Lake Park at Lake Nona. The broader name covers different developments and types of premises. It is not a separate city or a single entrance.
Call 407-979-4235 to discuss the actual address and current availability from the service shown on this St. Cloud site. For the large moving door rather than an entry lock, use garage door repair in Lake Nona.