Furnace keeps shutting off? In this episode of Repair and Replace, Vance shows how to troubleshoot a furnace that is short cycling or keeps shutting off. If the furnace runs for a minute and then shuts off, then its likely that a safety switch has tripped. These switches can cause the furnace to shut off prematurely or shut off before reaching the desired temperature. The easiest way to narrow down the problem is to look at the furnace error codes, but you can still troubleshoot the furnace by observing the startup sequence.

Order furnace parts online: https://www.amresupply.com/catalog/65...

This video explains 3 different scenarios of short cycling:

1) The furnace won't ignite
• Pressure switch is faulty:    • Furnace  Pressure Switch | Repair an...  
• Inducer motor has failed:    • Furnace  Draft Inducer Motor | Repai...  
• Furnace ignitor is faulty:    • Furnace Not Igniting?  Ignitor Testi...  

2) The furnace shuts off after ignition (blower fan doesn't run)
• Flame sensor is dirty or faulty:    • Furnace  Flame Sensor | Repair and R...  

3) The furnace blows warm air then shuts off
• Furnace filter is dirty:    • How to Replace a Furnace Filter | Rep...  
• Limit switch has failed:    • Furnace  Limit Switch | Repair and R...  

Watch more furnace repairs:    • Gas Furnaces | Repair and Replace  

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0:00 Intro
0:57 Safety Switches
1:59 Shuts Off Before Ignition
3:11 Shuts Off After Ignition
3:56 Shuts Off After Blowing Hot Air
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This furnace troubleshooting guide is applicable to all furnace brands including: Carrier, Emerson, York, Goodman, Honeywell, Lennox, Trane, Rheem, Bryant, Coleman, Westinghouse, White Rogers, Nordyne, Honeywell, Kenmore, Frigidaire, Amana

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