Lennox
E229
StatusIgnition on high fire
Low PS did not close; IFC lit on high. OEM: not a separate high-fire repair.
5 plates — walk the one on the cabinet
First check
1 Prove inducer and the live code
Do not pull power — that clears the Lennox EL195NE active code. Write E229. Is the inducer spinning on this call? Silent inducer is not a pressure switch. This is a low-fire draft problem wearing a high-fire costume. Fix E223 / E227 physics. Do not start on the high-fire manifold screw.
Expect: Inducer port: Open to the collector, not packed with oxide. Two hoses, never teed.
If fail: 120 VAC missing → IFC / door switch / incoming power. Voltage + dead motor → inducer.
If pass: Inducer running + this code → trap, hose, switch, vent (step 2).
The rest of the walkthrough is Diagnose.
On the plates
- This is a low-fire draft problem wearing a high-fire costume. Fix E223 / E227 physics. Do not start on the high-fire manifold screw.
- Also fires on high for ~60 s if continuous fan was already on (heat-exchanger warmup) — that one is information only.
- Fix E223 physics. Do not start on the high-fire manifold screw.
- Same metal-vent path as E223. Do not start on the high-fire manifold screw.