A few days ago, the bathrooms on the 2nd and 3rd floor of my townhouse stopped getting any hot water. Nothing comes out of the faucets when they are turned all the way to the hot side. The cold water works fine. The kitchen on the main floor and bathroom in the basement still receive hot and cold water.
On the day this happened, we checked our smart thermostat and it shows that the basement was under 10 degrees Celsius, and main floor was around 14 degrees. The weather outside in Toronto was around high -10s and low -20s. We suspect this has caused a section of the hot water pipe to freeze and have been keeping all areas of the house around 23 degrees for 3-4 days now, but a couple things don't seem to make sense if this suspicious is true:
- How does/did the hot water pipe freeze before the cold water pipe?
- How has running heaters near the walls and increasing internal temperatures not melted or thawed the problem sections yet?
- We have been keeping a couple of the faucets on the 2nd and 3rd floors slightly open to relieve any pressure buildup. With only the hot water tap turned on, sometimes nothing comes out and at other times, a slow stream of cold water comes out.
Townhouse was built in 2012. Water boiler/heater is in garage. Heating works fine. Water pressure in working areas (basement and main floor) seem fine. I have no idea what is going on. The weather is not going to warm up anytime soon and I want to prevent any further damage or complications.
Photos of faucets: https://imgur.com/a/lIjIK
Any suggestions/advice/tips are welcome! Thanks!