Intergas HRE / Rapid / ECO RF fault 27
Shortcut outside sensor
Gas boilerWhat it means
The outside temperature sensor has a short circuit fault.
Likely causes
- Outside sensor shorted
- Room thermostat setting incorrect
- Temperature setting too low
- Outside sensor shortcircuit
- Pump not running correctly / pump setting too low
- No circulation in installation
- Boiler power not correctly set for installation
- Lime scale or fouling in heat exchanger
Where to start
- Check outside sensor wiring and sensor itself for short circuit
- Check room thermostat setting - adjust if necessary, set to 0.1A
- If OK, check CH temperature setting - increase CH temperature, check outside sensor for short-circuiting and rectify
The full answer, free
- 3 more checks in order
- The readings and component tests from the manual
- How to put it right, step by step
- The manual page for this fault (page 49), right under the answer
Safety: Isolate gas and power before you open the case. If you have been into the gas side, do a tightness test, and a combustion and flue check before you hand back. Gas Safe (UK) or RGI (Ireland) work only.
From the Intergas manual for the HRE / Rapid / ECO RF. Check the model on the data plate before you order parts.