Err 162 Low water pressure under 10 psi (FILL)

What the control is telling you

Pressure dropped below 10 psi (0.7 bar); the error shows immediately together with FILL.

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

Likely causes

• System pressure too low
• Dirty or failed pressure sensor
• Pressure sensor cable

Test and repair steps

1. Raise system pressure to at least 16 psi (1.1 bar) and cycle power.
2. If the external gauge shows over 20 psi, inspect the pressure sensor and cable; clean a dirty sensor gently with a calcium/rust remover.
3. Replace the pressure sensor if needed.

Settings for these units

Maintenance intervals · Glow B85/B120/B160

Operating pressure should sit 5 psi under the relief valve rating (max 25 psig on a 30 psi valve); water never above 180 F.

Models that show this code

3 models in Glow B85/B120/B160

Other codes on the same units

• Err 129 DHW tank temperature sensor shorted
• Err 130 Flue temperature sensor shorted
• Err 134 Too many resets in a short time
• Err 156 Blocked flue switch open
• FILL Low water pressure prompt
• Loc Lockout prefix
• Loc 0 Internal software fault
• Loc 1 Ignition failed three times in a row