Slant/Fin Error Lockout 113 / Hold 27: Flame circuit timeout / flame sensor shorted to ground
A flame-sensing circuit fault shows up as a flame-circuit timeout (Lockout 113 — flame sensed during the Initiate/off cycle for over 240 seconds causes lockout) or, for a flame sensor shorted to ground, as Hold 27 ('Flame sensor shorted to ground detected'). The Slant/Fin CHS manual documents the causes/checks for code 113 as: a blocked condensate drain, external voltage applied to the R & CH terminals, or a 4-20mA input current greater than 21mA. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
A flame-sensing circuit fault shows up as a flame-circuit timeout (Lockout 113 — flame sensed during the Initiate/off cycle for over 240 seconds causes lockout) or, for a flame sensor shorted to ground, as Hold 27 ('Flame sensor shorted to ground detected'). The Slant/Fin CHS manual documents the causes/checks for code 113 as: a blocked condensate drain, external voltage applied to the R & CH terminals, or a 4-20mA input current greater than 21mA.
Slant/Fin fault codes can vary by model and series. Use this as a guide — the same code can have more than one cause. Our Technical Safety BC–licensed technicians read the code, confirm it against your unit's manual, and diagnose the true cause before any repair.
Likely causes of Slant/Fin error Lockout 113 / Hold 27
- Blocked condensate drain causing a flame-circuit short to ground
- External voltage incorrectly applied to the R & CH terminals
- 4-20mA input overdriven above 21mA
- Flame rod / wiring shorted to ground or chassis
What you can safely check
- Check that the condensate trap and drain are clear and water is flowing out
- Avoid touching the control wiring; note the exact code for the technician
Beyond these checks, do not open the unit or touch gas/electrical parts — BC law requires a licensed gas fitter. Call us for a proper diagnosis.
Error Lockout 113 / Hold 27 usually leaves you without heat or hot water and can indicate a safety-related fault. Don't keep resetting it — call for priority after-hours Slant/Fin repair.
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Slant/Fin Error Lockout 113 / Hold 27 Repair Across Metro Vancouver
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