IBC Technologies · Error codes
IBC VX “Module high current” alert
Error – Module High Current
The manual lists this alert when the voltage supply to the safety and ignition module (SIM+) and gas valve exceeds 24 VAC. The module monitors its own supply to protect the control electronics and the gas valve circuitry.
Applies to
This alert is shown by the V-10 touchscreen controller on VX Series residential boilers (VX 110, VX 150 and VX 199), as documented in IBC Installation & Operating Manual — VX 110 / VX 150 / VX 199, doc 120-347E6, sections 9.2–9.4.
Controller: V-10 touchscreen controller. Source manual: 120-347E6 (2026-08-07).
Why a code is not a diagnosis
Excess voltage usually points to a transformer fault, a wiring fault, or voltage backfeed from field wiring — not to the boiler's gas or water circuits. An electrician-grade check of the supply and transformer is part of the diagnosis.
Safe things to observe
- Note the alert text and whether the boiler display dims, flickers or shows other electrical symptoms.
- Check whether the alert appeared after other electrical work in the home.
- Do not touch electrical components; leave the cabinet closed.
Do not
- Do not open the boiler cabinet or touch the transformer, module or wiring.
- Do not keep resetting the boiler while the supply voltage is suspect.
How professional service helps
- A technician measures the incoming supply and transformer output voltages.
- Wiring and harness connections to the SIM+ module and gas valve are inspected.
- Any voltage backfeed from field wiring is traced and corrected.
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Parts and service
Parts commonly involved
These parts appear in the documented text for this alert. A code reports a condition, not a failed part — a technician confirms the cause by testing before anything is replaced.
Ignition electrode
The ignition electrode creates the spark that lights the burner in a gas boiler, and on many models it also senses the flame once it is burning.
What a technician checks →Gas valve
The gas valve is the boiler's controlled gateway for gas: it opens only when the control has proven safe conditions, meters the fuel to the burner,…
What a technician checks →
Service for this alert
- Gas Boiler Repair
Licensed gas technicians from ROMA Heating & Cooling diagnose and repair residential and light-commercial gas boilers across…
Every boiler part explained — what it does, how it fails and what a technician checks.
Documented for IBC Technologies VX Series.
Boiler locked out? Call with the alert text ready.
The brand, model and this alert are passed along when you request service online, so the technician arrives prepared.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
- IBC Installation & Operating Manual — VX 110 / VX 150 / VX 199, doc 120-347E6, sections 9.2–9.4 · 120-347E6 · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.