Ruud Error Code 16: Outlet Temp Sensor Fault
How to Fix Ruud Code 16
- Step 1: Power cycle the unit by turning off the breaker for 30 seconds, then turn it back on. This may reset a temporary error.
- Step 2: Check the wiring connections on the outside of the unit for any obvious signs of damage or corrosion. Do not open the unit.
- Step 3: If the error persists after power cycling, contact a qualified HVAC technician to diagnose and repair the issue.
What Does Ruud Error Code 16 Mean?
The 'Outlet Temp Sensor Fault' (Error Code 16) on your Ruud tankless water heater indicates that the control board isn't receiving a valid signal from the temperature sensor located at the outlet of the unit. This sensor is responsible for monitoring the hot water temperature as it leaves the heater. The control board uses this information to modulate the burner and maintain a consistent output temperature. When the control board detects a fault—either a short, open circuit, or an out-of-range reading—it triggers this error and shuts down the unit. This is a safety measure to prevent overheating or delivering water at an unsafe temperature. It's important to address this issue promptly to restore hot water service and ensure the water heater operates safely and efficiently. Because the unit is locked out, you will not have hot water until the issue is resolved.
Common Causes of Ruud Code 16
- Faulty outlet temperature sensor
- Loose or corroded wiring connections to the sensor or control board
- Damaged wiring harness leading to the sensor
- Defective control board
Applicable Ruud Models
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