10 Reasons a Gas Heater Short Cycles
Short cycling is a malfunction that causes your heating system to quickly switch on and off for short time periods, generally between four and seven seconds per cycle. If you see consistent, short bursts of activity, you're experiencing short cycling. The reasons for short cycling vary from small breakdowns to significant issues that will require new parts or in rare cases even a brand-new heating system. Frequently, short-cycling is the result of overheating in the heater, which leads security functions in the furnace to instantly shut it down.
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