Riello RS/E BLU Burner Control (REC 27.100A2 with RDI21 display)
Riello RS/E BLU Burner Control (REC 27.100A2 with RDI21 display) code c: 22: c: 22 / OFF S (alternating with d: 0 and combinations)
The burner locks out at startup because the safety circuit or burner flange is open.
Safety first. This code involves a gas, flame or electrical hazard. Do not keep resetting it. Leave burner, gas train and high voltage work to a qualified technician. WERCS answers 24/7 at (877) 489-3727.
- Code
- c: 22
- Name
- c: 22 / OFF S (alternating with d: 0 and combinations)
- Controller
- Riello RS/E BLU Burner Control (REC 27.100A2 with RDI21 display)
- Type
- General fault
- What it does
- Lockout: the control shuts down and stays off until it is reset
- Risk
- RED Specialist territory
- Reset
- Needs a manual reset
- Source
- The manufacturer's manual (subscribers see which manual and page)
Updated July 23, 2026
How to fix it
Subscribers get:
- What to do next, in plain words
- Which manufacturer manual it comes from, linked
- The 3 common causes listed for this code
- Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
Questions about this code
What does Riello RS/E BLU Burner Control (REC 27.100A2 with RDI21 display) code c: 22 mean?
The burner locks out at startup because the safety circuit or burner flange is open.
Is Riello RS/E BLU Burner Control (REC 27.100A2 with RDI21 display) code c: 22 dangerous?
It is graded red, specialist territory: it involves a burner, gas, flame or safety lockout, so leave the repair to a qualified technician.
How do I fix Riello RS/E BLU Burner Control (REC 27.100A2 with RDI21 display) code c: 22?
The manual's fix and the step by step check for this code are in WERCS Diagnose, plans from $49 a month. For help right now, WERCS answers 24/7 at (877) 489-3727.
Other Riello RS/E BLU Burner Control (REC 27.100A2 with RDI21 display) codes
c: 12 · c: 12 (alternating with d: 0/1/2/3/4/5)c: 14 · c: 14 (alternating with d: 0/1/64)c: 20 · c: 20 (alternating with d: 0/1)c: 21 · c: 21 (alternating with d: 0/1/64)c: 60 · c: 60 (d: 0)c: 70 · c: 70 (with d: 23 / d: 26)c: 71 · c: 71 (with d: 0/1/2/3)c: 85 · c: 85 (with d: 0 / d: 1)c: 93 · c: 93 (with d: 3)c: 95 · c: 95 (with d: 3/4/5/6)
All 24 Riello RS/E BLU Burner Control (REC 27.100A2 with RDI21 display) codes · Every fault code