Intergas HRE / Rapid / ECO RF fault 7
Frost protection active (pre heating heat exchanger)
Gas boilerWhat it means
Displayed when the appliance's internal frost protection is activated. If the heat exchanger temperature falls too low, the burner switches on and the pump runs until the heat exchanger temperature is sufficient. This symbol indicates pre-heating of the heat exchanger is in progress.
Likely causes
- Appliance manually switched off while still powered
- Low ambient/system temperature risking freezing of the heat exchanger
- 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 LED status at the power button to determine if DHW comfort function is on
- In this operating mode the pressure in the CH installation (in Bar) can also be read on the main display
- Check heat exchanger temperature
The full answer, free
- 7 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 13), 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.