44
Rheem
Ignition Lockout – Excessive Retries
Status LED flashes 4 short and 4 long (44); furnace may not ignite or may lock out
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Intermittent gas valve, Loose gas valve wiring, Unstable gas supply, Control board timing fault
How to Fix / Troubleshooting
Safety first: Turn off gas and power. Repeated ignition failures can lead to raw gas accumulation.
- Inspect gas valve connections: Tighten spade connectors at the gas valve and ensure wiring matches the Rheem wiring diagram.
- Observe ignition attempts: After resetting power, watch several cycles. Note if ignition is delayed, uneven, or if burners light then drop out.
- Check for supply issues: If other gas appliances also behave erratically, contact your gas utility to check supply pressure.
- Replace suspect components: If voltage to the gas valve is stable but the valve opens inconsistently, replace the gas valve. If timing or sequencing is abnormal, the control board may need replacement.
Gas valve replacement should be performed by a licensed professional due to leak and combustion risks.
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Repair Difficulty
Professional Required
5/5
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