BoilerFaultCodesPotterton E83484 Fault Code
The Potterton E83484 fault code means: your boiler is struggling to accurately measure the temperature of your hot water, which usually means your taps will only run cold.. It appears on 1 Potterton model in our database.
Technical description: DHW NTC Sensor c/w cable 1.25 m
What causes the Potterton E83484 fault?
This fault occurs when the internal sensor responsible for monitoring your hot water temperature fails or sends an unreadable signal to the main control board. The most common reason is that the sensor has physically degraded over time or a loose connection in the wiring harness is preventing the boiler from knowing how hot the water is. To prevent overheating, the boiler will stop heating your water entirely until the part is replaced.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Gas Safe Register →Potterton models that show the E83484 fault code
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Source
Potterton E83484 fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026