The old hair dryer truck worked for me when it got cold back in my Michigan day. I did thaw out a frozen drain pipe in Fairbanks a few winters ago by cobbling a. Few brass fitting to connect to the sink faucet aireator and a long piece of 1/4" plastic tubing. I shoved it down past the trap till it didn't go no more and turned on the hot water. If the sink back filled, we scooped it out and went back at it. Eventually we had it open enough where the flowing hot water took care of the rest
