Flow switch
A boiler that does not see the DHW tap is checked at the flow switch and impeller on Rinnai or Immergas.
Boiler repair at home in Minor
Home visitDiagnostics with repairWarranty on labor
Boiler repair in Minor: no flow sense, soot on low power, or a fan fault — the technician checks the flow switch, burner, and flue fan.
On Rinnai and Immergas by Minor metro we inspect the DHW flow switch and burner soot first, then the flue fan.
In estate kitchens by the Minor pavilion clear the wall-hung boiler and the coaxial flue toward the vestibule.
from 200,000 sum
Free diagnosticsExact price after diagnostics. We agree on the estimate and parts needed before work starts.
Arrival in 1-2 hours
Warranty included
Home repair
10+ years experience
Minor
Service Area
Visit time
Confirmed by phone
How to arrange a visit
- Share the Rinnai, Immergas, or Fondital model and the display fault code
- Note no flow sense, soot on low power, or a fan fault
- Clear access to the gas cock and coaxial flue in the estate kitchen by Minor metro
How the visit works
Burner soot
Soot on low power is cleared by inspecting the jets and mix on Fondital.
Flue fan
A fan fault is traced to the flue impeller and air pressure switch before a board swap.
Exchanger & gas
Issues We Fix
Heating and DHW
- Radiators stay cold
- No hot water
- Won't hold temperature
Ignition and gas
- Won't start / no ignition
- Soot / gas smell
Pressure and leaks
- Pressure dropping
- Heat exchanger leaking
Electronics
- Display error
- Noisy operation
- Short cycling
Brands We Service
- Baxi
- Vaillant
- Ariston
- Bosch
- Ferroli
- Navien
- Buderus
- Protherm
- Immergas
- Kiturami
- Rinnai
- Fondital
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Gas boiler heat exchanger cleaning
If radiators stay lukewarm, the boiler is slow to heat, or it short-cycles — scale in the heat exchanger is a common cause. It cuts heat transfer, raises gas consumption, and can overheat the unit.
On diagnostics the technician flushes the primary and secondary exchangers, checks temperature sensors and the return filter. We agree the scope and price before cleaning starts.
Frequently Asked Questions
Boiler not heating or showing an error?
Tell us the model and fault code — we'll advise on a home visit and prepare for diagnostics.
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