Insufficient water heating (ICON System V1)
LED: 3 flashes, 3-second pause
On the ICON System V1 control, three flashes with a three-second pause mean "Insufficient water heating. System will reset". The manual's probable causes are a thermal sensor out of calibration or a faulty gas control, and its service procedure is to replace the gas control.
Applies to
Applies only to tanks fitted with the ICON System V1 gas control. The V2 control and the White Rodgers electronic control do not document a three-flash pattern, so a three-flash reading identifies the control as V1.
- Bradford White Defender Safety System atmospheric vent (RG2)
- Bradford White RG240T6N
- Bradford White RG230T6N
- Bradford White RG240S6N
- Bradford White RG250T6N
- Bradford White RG250S6N
- Bradford White RG230S6N
- Bradford White RG130T6N
- Bradford White RG140T6N
- Bradford White RG150T6N
- Bradford White RG250L6N
- Bradford White RG260T6N
Control platform: Bradford White ICON System V1 electronic gas control (green LED status light). Source manual: 238-51542-00E (REV 08/22).
Why a code is not a diagnosis
The code is a temperature-control complaint, not a pilot or ignition fault: the control believes the water is not being heated to the setpoint. A sensor out of calibration and a faulty control are the manual's two causes; both end in gas-control replacement per the service procedure, but a technician verifies the sensor first.
Safe things to observe
- Confirm the control is a V1 (single-colour LED) before reading the pattern as three flashes.
- Note whether the burner runs at all and how warm the water actually is at the taps.
Do not
- Do not assume the tank is heating normally because the pilot is lit.
- Do not replace parts without the manual's sensor checks.
How professional service helps
- A technician verifies the temperature sensor reading and the control per the service manual, then replaces the gas control as directed.
Diagnostic visit
Repair visits carry a diagnostic service fee that CANRO states is credited toward the repair if you proceed. The amount is confirmed by phone; it is not published. Source, checked September 7, 2026.
Where CANRO provides on-site service
On-site service is currently offered across Metro Vancouver: Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Delta, Langley, Port Moody, Port Coquitlam, Maple Ridge, Pitt Meadows, White Rock, Tsawwassen; plus Anmore, Belcarra, Lions Bay, Bowen Island, Abbotsford with travel or ferry arrangements confirmed by phone. Everything else on this site is reference information you can use anywhere in Canada.
Frequently asked questions
Is three flashes on any Bradford White control the same?
No. Three flashes are documented only on the ICON System V1 control. If the control is a V2 or a White Rodgers electronic unit, read its own chart; the pattern is not defined there.
Locked out with no hot water? Call with the code ready.
The brand, model and this code are passed along when you request service online, so the technician arrives prepared.
On-site service in Metro Vancouver, BC. Call to check availability.
Sources and verification
- Defender Safety System Service Manual, ICON System V1 troubleshooting chart · 238-51542-00E · accessed September 7, 2026
- Installation and Operation Manual, LED status tables · 238-51012-00V · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.