Thrawing out frozen pipes should be done safely so follow this step by step guide on what to do when you run into the problem of having your water or drain pipes freeze. As long as you’re home (and not off vacationing somewhere warm) you can usually fix the problem yourself. Here are some tips on how to thaw your frozen pipes.
Check to make sure the frozen pipe hasn't cracked. When water freezes into ice it expands, so if the water in the pipe is frozen solid it may have expanded enough to actually crack the pipe (in which case you'll need to repair the pipe). However, in many cases a water pipe isn't cracked; it's just blocked
Thaw your pipe by using one of the following methods (depending on what you have available and how easy or difficult it is to get to the pipe).
Wrap the frozen pipe with electric pipe heating tape (available at home stores). Run a propane plumbing torch or blowtorch along the frozen pipe.
Snake a piece of rubber tubing down the drain until it hits the ice. Attach the end of the tube that's in your hand to the spout of a boiling kettle of water. The steam from the kettle will travel down the pipe and melt the blockage.