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My furnace seems to work intermittently. overnight its seems to stop... i have checked the thermostat and it shows says it is heating. fan is on auto, but nothing coming out. when i turn heat to off, then back on again i can hear the furnace try to start up... however it cuts out a couple seconds later. i try that a couple of times then it seems to work again for a while... any help would be appreciated. A

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    You'll need to add more information: Is it a boiler, hot air furnace, or something else? Is it fueled by oil, natural gas, or something else? – Tim B Dec 11 '17 at 3:12
  • When you say "i can hear the furnace try to start up", what exactly do you hear? What is the make and model of the unit? What does the system use for ignition (standing pilot, spark gap, hot surface ignitor etc.)? – Tester101 Dec 12 '17 at 13:30

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