Blower current too low after the heat on-delay: the main blower is below the value the control expected, and the furnace goes to hard lockout.
Likely causes
- Loose motor wiring connections
- Blower motor not operating correctly, or the wrong speed setting
Safe checks for EbL
- Write down EbL before power is removed. Hard lockout does not clear by waiting out a normal retry
- Techniciancheck for loose motor wiring connections
- Technicianverify blower motor voltage, amps and the speed setting. If the blower motor is not operating correctly, replace the motor
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Call a licensed HVAC technician. EbL is a blower-motor current fault that ends in hard lockout.
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Parts & tools for this fix
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Furnace blower (circulator) motor: guide
In this code: Blower motor not operating correctly, or the wrong speed setting
This one is for a technician to test or replace, so we only explain it and do not link to buy it.
Multimeter for appliance and HVAC diagnosis: guide
Technician step in this code: verify blower motor voltage, amps and the speed setting. If the blower motor is not operating correctly, replace the motor
This one is for a technician to test or replace, so we only explain it and do not link to buy it.