Takagi Water Heater Error Code 32: How to Fix It

Q: What does error code 32 mean on a Takagi water heater?

Error code 32 on a Takagi tankless water heater indicates a fault with the outlet thermistor — the temperature sensor that monitors the hot water temperature leaving the unit. The heater shuts down when this sensor sends an abnormal or missing signal to protect the system from unsafe temperatures.

Q: Can I still use my Takagi water heater with error code 32 showing?

No. When error code 32 is active, the Takagi heater will not produce hot water because it has shut itself down as a safety measure. You need to resolve the thermistor fault before the unit will operate normally again.

Q: How much does it cost to fix a Takagi error code 32?

If the repair is just a faulty outlet thermistor, the part itself typically costs between $15 and $50 depending on the model. If you hire a technician, expect to pay an additional $75–$150 or more in labor. If the control board is damaged and needs replacement, costs can rise to $200–$400 or more including parts and labor.

Q: How do I reset error code 32 on my Takagi water heater?

To reset, press and hold the Reset button on the front panel for 3–5 seconds. However, if the underlying thermistor fault has not been fixed, the error code will return after the reset. A reset alone is not a repair — you need to diagnose and correct the thermistor or wiring issue for a permanent fix.

Q: Is error code 32 the same as error code 35 on Takagi water heaters?

No. Takagi error code 32 specifically relates to the outlet (hot water side) thermistor. Error code 35 typically refers to an inlet thermistor fault. Both involve temperature sensors, but they are located on opposite ends of the heat exchanger and are separate components. Make sure to identify and test the correct thermistor based on the code displayed.

Abstract

Takagi error code 32 indicates a fault with the outlet thermistor — a small temperature sensor located on the hot water outlet of your tankless water heater. This sensor monitors the temperature of the water leaving the unit, and when it sends a reading outside the expected range (or no reading at all), the heater shuts down to prevent overheating or unsafe operation. The cause is usually a faulty or disconnected thermistor, but it can also point to wiring problems or, less commonly, a failed control board.