HVACopediaMajestic · Gas fireplace
1 RED / 2 sec (until reset) Pressure switch failure (power vent only)
What the control is telling you
Single red flash every 2 seconds until manual reset. Applies only to power vent versions.
Applies to: Power vent versions of the SC7 control
Likely causes
- Pressure switch did not prove on a power vent unit
Test and repair steps
- Check the vent system for blockage
- Check the pressure switch and its wiring
- Reset by cycling the master switch OFF then ON
Other codes on the same units
- 1 BEEP Single beep (confirmation)
- 1 GREEN / 2 sec Pilot lockout - trial for ignition
- 1 RED Conversion cover missing
- 1 RED / 10 sec Low battery
- 1 RED-GREEN / 2 sec Pilot lockout - flame loss
- 2 BEEPS Double beep (confirmation)
- 2 RED Spark fail
- 2 RED / 10 sec No or low thermopile power
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Source: Majestic DVBL7 Series Installation and Operating Instructions, p. 41. Summarized in our own words; check the original manual for your model.
Homeowner looking at this code? See what it means for you and when to call a technician.
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.