Noritz NRCP Eco TOUGH Code Er29
Air pressure switch fault. The air pressure switch is not reporting what the unit expects. Noritz's remedies are the exhaust pipe free of obstructions, a clean intake air filter, and making sure the condensate trap or drain pipe is not clogged. Manual reset.
Also displayed as: 29, E29
Call a proThe verdict
Call a licensed plumber
All three named causes are things you can look at without opening the appliance — the terminal outside, the air filter, the condensate line. Do those first. What you should not do is start opening vent joints to look further.
Typical cost: $0–$700
US estimate for parts and labor. Prices vary by region and by who does the work — see how we estimate costs.
What the manual says
The meaning above is transcribed from the manufacturer's diagnostic documentation for the NRCP Eco TOUGH — not averaged across the brand.
Source: Noritz Service Manual — NRCP1112-DV / NRCP982-DV Eco TOUGH (Rev. 05/19) (p. 58), read Sep 2026 — the manufacturer's own documentation for this exact series.
What you can safely check
Before anything else: if you smell gas, stop here, leave, and call your gas utility.
- Check the exhaust terminal outside for snow, leaves, a nest or anything built against it.
- Clean the intake air filter.
- Check the condensate trap and drain pipe are not clogged or frozen.
- If all three are clear, call a licensed professional rather than taking vent sections apart.
Code Er29 on other Noritz series
Other Noritz series report code Er29 under the same fault name, but each manual is transcribed separately and they do not read alike:
Don't confuse this with
3 other Noritz NRCP Eco TOUGH codes point at a switch too. They are different components in different places, and ordering a part against the wrong one is the most common way this fault gets expensive: