If I shut off my water will my heating system still work?

Your heating system should continue working when you shut off your home’s domestic water supply. Here’s why:

For Hydronic/Hot Water Heat:

• Your boiler uses a closed loop system
• This means the same water circulates over and over
• It’s separate from your household water
• It will keep working unless you have a leak in the system

For Other Heating Types:

• Forced hot air (furnace) doesn’t use water
• Electric baseboards don’t use water
• Heat pumps don’t use water

Exception:

• If your boiler shows signs of low pressure or needs frequent refilling, you may have a leak, in this case, have it checked before shutting off your water

Bottom line: Turning off your domestic water shouldn’t affect your heating system unless there’s an underlying problem.