Majestic Gas Fireplace: Millivolt: pilot lights but will not stay lit
Millivolt: pilot lights but will not stay lit on a Majestic gas fireplace: Pilot burns while the knob is held in but goes out when released.
Applies to: 400DVBLN/PV7, 500DVBLN/PV7 (millivolt)
Common causes of millivolt: pilot lights but will not stay lit
- Weak thermocouple
- Bad gas valve
How to fix millivolt: pilot lights but will not stay lit: step by step
- Make sure the flame wraps the thermocouple; clean or adjust the pilot
- Check thermocouple is fully inserted and tight at the valve
- Disconnect the thermocouple, meter its tip to the copper lead with the pilot running and the knob held in: below 15 mV replace the pilot assembly
- Above 15 mV and still dropping out: replace the valve
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.
If the unit shows an error code, look it up: Majestic Gas Fireplace codes
Source: Majestic DVBL7 Series Installation and Operating Instructions, p. 46. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.