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
The same code number can mean something different on another series — make sure you're reading the page for your exact unit:
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: