Glow Brand Error Code Loc 2: Gas valve relay fault (Boiler)

Updated October 16, 2026 · by Aurora Star Tech Inc.

Glow Brand error code Loc 2 on a boiler means: Gas valve relay fault. It is also called Glow Brand diagnostic code Loc 2.

High severityBoilerGlow B85/B120/B160

Homeowner? What Glow Brand code Loc 2 means for you

Call a technician Your boiler is reporting: Gas valve relay fault. The boiler has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.

Safe things you can check yourself

Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
Make sure the unit has power: its on/off switch (often looks like a light switch near the unit) is ON and the breaker in the electrical panel is not tripped.
Look at the pressure gauge on the boiler. If it reads much lower than usual or near zero, or water is leaking, call a technician.
Outside, make sure the intake and exhaust pipes or vent cap are not blocked by snow, ice, leaves or a nest.
Check that the boiler gas valve is open (handle in line with the pipe).
Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.

Call (647) 657-2977 Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Glow Brand error code Loc 2 mean?

The control saw a problem in the gas valve electrical circuit and locked out.

Applies to: B85, B120, B160 (NG and LP)

Common causes of Glow Brand code Loc 2

Loose gas valve harness connection
Loose or poor line, neutral or ground connection to the boiler, or a bad internal ground
Electrical noise nearby (welders, large pump drives)

A technician checks these and 1 other possible causes on site before replacing any part.

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.

Glow Brand models that use code Loc 2

B85 B120 B160

Other Glow Brand Boiler codes

Code	Meaning
Err 162	Low water pressure under 10 psi (FILL)
FILL	Low water pressure prompt
init	Display starting up
Loc	Lockout prefix
Loc 0	Internal software fault
Loc 1	Ignition failed three times in a row
Loc 3	Safety relay fault
Loc 4	Blocking error lasted over 20 hours
Loc 5	Fan not running for more than 60 seconds
Loc 6	Fan running too slow for more than 60 seconds
Loc 7	Fan running too fast for more than 60 seconds
Loc 8	Internal software fault

All Glow Brand Boiler error codes →

Glow Brand code Loc 2: homeowner questions

What does Glow Brand code Loc 2 mean?

Gas valve relay fault. The control saw a problem in the gas valve electrical circuit and locked out.

Is it safe to keep using my boiler with code Loc 2?

It depends on the cause. The boiler has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.

Can I reset Glow Brand code Loc 2 myself?

You can try one reset (power off for 30 seconds, then on). If Glow Brand code Loc 2 comes back, the cause is still there and a licensed technician should check it.

Who can fix Glow Brand code Loc 2 near me?

Aurora Star Tech Inc. repairs Glow Brand boilers in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.

Homeowner help: Boiler Not Heating: What to Check

Troubleshooting guides

Condensing/corrosion of conventional boiler All brands · Boiler
No heat or some zones cold All brands · Boiler
Noise All brands · Boiler
Poor heat / circulation All brands · Boiler
Relief valve weeps every cycle / pressure climbs All brands · Boiler
Short cycling / wasted fuel All brands · Boiler
Symptoms of air in system All brands · Boiler
Uneven heating All brands · Boiler
Won't fire All brands · Boiler
Boiler pressure keeps dropping / FILL shows Glow Brand · Boiler
Cancel the 14-minute de-air sequence Glow Brand · Boiler
Change display units and run the display test Glow Brand · Boiler
Cleaning the combustion side of the heat exchanger Glow Brand · Boiler
Clear a lockout Glow Brand · Boiler
Display is blank Glow Brand · Boiler
Display normal but no domestic hot water (indirect tank) Glow Brand · Boiler
Display normal but no heat to the space Glow Brand · Boiler
Navigate the menus Glow Brand · Boiler
Open the Installer Menu (CodE, password 0300) Glow Brand · Boiler
Read error history and live data (Information Menu 1.000) Glow Brand · Boiler
Reset the service reminder (wrench icon) Glow Brand · Boiler
Run the system test (fixed fan / low / ignition / high fire) Glow Brand · Boiler
Set the appliance type for CPVC / high temperature venting Glow Brand · Boiler

Source: Glow Brand B85/B120/B160 Installation & Operation Manual V20231025, Table 12.1 p.62. 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.