I am going away for a week, I want to shut off all water to my home. I have an oil furnace, with a separate water boiler (connected to the oil furnace – there is no gas in the house). It is summer in my area. Do I need to turn my furnace or water boiler off? What could go wrong if I leave the furnace / boiler on?
Thanks
Best Answer
If the water is shut, should water level drop, e.g. if an outside faucet were turned on, it's likely a water heater or boiler would be damaged.
If plumbing is sound, I'd not shut the water for just one week in summer, since it's unlikely pipes would freeze. For a long-term winter vacation, if turning off heat, you'd need to drain the plumbing, dish- and clothes-washer, flush toilets, put potable antifreeze in drains, etc.