If you're looking for help fixing your Keeprite Furnace, look no further! Our comprehensive Keeprite Furnace error code guide will explain common issues, provide tips, and show you how to read your model's error codes.

CODE: LED flashes like a heartbeat  
PROBLEM: Control has 24 VAC power  

CODE: Two LED flashes  
PROBLEM: Unit’s pressure switch didn’t open  
FIX: Check for an obstruction in the pressure tubing 

CODE: Three LED flashes  
PROBLEM: Unit’s pressure switch didn’t close or reopened  
FIX: Check for: excessive wind; proper vent size; defective inducer motor; defective pressure switch; inadequate combustion air supply; disconnected or obstructed pressure tubing; or restricted vent 

CODE: Four LED flashes  
PROBLEM: Limit circuit fault: either a limit or flame rollout is open  
FIX: Check for: restricted vent; proper vent sizing; loose blower wheel; excessive wind; dirty air filter; or defective blower 

CODE: Five LED flashes  
PROBLEM: An abnormal flame proving signal, the flame is likely proved while the gas valve is de-energized  
FIX: Check for a leaky gas valve or a gas valve that is stuck open 

CODE: Six LED flashes  
PROBLEM: Failure to ignite or the flame sensor was lost while running  
FIX: Check for: an ungrounded flame sensor; defective hot surface ignitor; low inlet gas pressure; oxide buildup; manual valve shut off; control ground continuity; inadequate flame carryover; or rough ignition 

CODE: Seven LED flashes  
PROBLEM: Limit circuit lockout  
FIX: A lockout will occur if the limit or flame rollout is open for longer than 3 minutes. Control will auto-reset after 3 hours 

CODE: Eight LED flashes  
PROBLEM: Gas heating lockout, control won’t auto-reset  
FIX: Check for a miswired gas valve or a defective control valve 

CODE: Ten LED flashes  
PROBLEM: Polarity is reversed  
FIX: Review instructions to correct polarity 

CODE: 1 + 2  
PROBLEM: The blower is on after power up  
FIX: Occurs if the unit is powered up during a call for heat or opens while the blower is on delay 

CODE: 6 + 1  
PROBLEM: Ignition lockout  
FIX: Control will auto-reset after 3 hours 

CODE: LED is off  
PROBLEM: Secondary voltage fuse is open  
FIX: Check whether the door switch isn’t closed or for a short circuit 

CODE: LED is on  
PROBLEM: Control circuitry lockout  
FIX: Will auto-reset after 1 hour 

CODE: LED is solid  
PROBLEM: Gas valve relay is stuck while open, flame sense circuit failure, or software-check error  
FIX: Reset power to clear the lockout and then replace control if status code repeats itself

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