IBC Technologies · Error codes
IBC DC Series LO P — Boiler Loop Pressure Too Low
LO P
Boiler loop pressure too low. Bring the system back up to pressure; check pressure sensor; replace pressure sensor. The table classifies it as warning.
Applies to
This sensor fault code is displayed by the DC control on DC legacy models (DC-23-84 through DC-33-160), as documented in DC Series Installation & Operating Manual, doc 120-183-A-R11 (120-183-A-R11). Codes can differ between controller generations, so always check the manual that matches your unit.
- IBC Technologies DC Series (discontinued)
- IBC DC 23-84
- IBC DC 15-95
- IBC DC 15-96
- IBC DC 29-106
- IBC DC 33-124
- IBC DC 20-125
- IBC DC 33-160
Controller: DC control. Source manual: 120-183-A-R11.
Why a code is not a diagnosis
A sensor code usually means the sensor, its wiring or its mounting is faulty; the physical condition the sensor measures (temperature, pressure, flow) may be perfectly normal.
Safe things to observe
- Note the code; there is no homeowner-accessible check for sensor circuits.
- If the appliance still runs, watch whether the code returns and report it when you call.
Do not
- Do not open the appliance to test or replace sensors yourself.
How professional service helps
- A technician measures the sensor and harness against the manual's values and replaces the faulty component.
- Combustion and safety devices are verified with an analyser and the manufacturer's procedure after any repair.
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.
Frequently asked questions
Can I clear this code myself?
Clearing a code without fixing its cause usually just brings it back. Note the code, check the safe items on this page, then call a licensed technician. If your appliance manual describes a user reset for this exact code and it stays away, no call may be needed.
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
- DC Series Installation & Operating Manual, doc 120-183-A-R11 · 120-183-A-R11 · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.