"Hey, I'm Joan from Toronto. I had issues with frozen pipes in cold climate. I normally call local plumbers for servicing. The last Christmas time, I hired a professional plumber from a reputed plumbing service. He did a very good job and also gave some tips to find frozen pipes. It will definitely help you.
Turn on all faucets
It will help you narrow down your search. The faucets that have little or no water pressure probably have a frozen pipe in their supply line. If every faucet is showing low water pressure, the frozen pipe may be near the water meter.
open the faucet that the pipe feeds water into
Make sure to open both the hot and cold handles. This will help to reduce pressure in the system and will let the water to escape once you begin to thaw the pipe.
Check poorly heated regions
Pipes are most likely to freeze in poorly heated areas like crawlspaces, basements, attics, and outside walls. Make sure to inspect the pipes in these areas, frozen pipes are cold to the touch and usually have a layer of frost or ice."