Vokera Synergy fault E035
Blockage obstruction flue gas low power
Gas boilerWhat it means
Flue gas blockage/obstruction detected at low power, definitive alarm.
Likely causes
- Certain environmental conditions (not specified further)
- Flue obstruction at low power
- Flue gas obstruction
- Primary heat exchanger requiring cleaning (related to fault E091)
Where to start
- Check frequency of notification occurrence
- Determine if notification is frequent or isolated
- Insert fumes analysis probe until it reaches the stop
The full answer, free
- 12 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 27), 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 Vokera manual for the Synergy. Check the model on the data plate before you order parts.
Other Vokera Synergy fault codes
- AF1DHW anti-freeze function active
- AF2Heating anti-freeze function active
- E010Flame lockout
- E033Rotor fan failure damaged
- E034Chimney obstruction in preventilation
- E036Blockage obstruction flue gas high power
- E040Water pressure low, fill the system
- E041Fill the system
- E050Smoke obstruction error low power
- E051Result of a calibration performed under flame instability/obstruction conditions
- E055No card fan communication
- E091Heat exchanger requires cleaning (unusual usage threshold reached)
- E092Calibration failed, excessive number of calibrations within the hour
- E093Too many calibration attempts
- E095Calibration failed
- E099Reset attempts exhausted