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Siemens LME7 Series Burner Control

Siemens LME7 Series Burner Control Loc 22: Safety loop open

The Siemens flame safeguard locks out the burner because the safety loop is open.

Safety first. This code involves a gas, flame or electrical hazard. Do not keep resetting it. Leave burner, gas train and high voltage work to a qualified technician. WERCS answers 24/7 at (877) 489-3727.
Code
Loc 22
Name
Safety loop open
Controller
Siemens LME7 Series Burner Control
Type
Pressure
What it does
Lockout: the control shuts down and stays off until it is reset
Risk
RED Specialist territory
Reset
Needs a manual reset
Source
The manufacturer's manual (subscribers see which manual and page)

Updated July 22, 2026

How to fix it

Subscribers get:

  • What to do next, in plain words
  • Which manufacturer manual it comes from, linked
  • The 2 common causes listed for this code
  • The step by step check for this problem, one check at a time
  • Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
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Questions about this code

What does Siemens LME7 Series Burner Control Loc 22 mean?

The Siemens flame safeguard locks out the burner because the safety loop is open.

Is Siemens LME7 Series Burner Control Loc 22 dangerous?

It is graded red, specialist territory: it involves a burner, gas, flame or safety lockout, so leave the repair to a qualified technician.

How do I fix Siemens LME7 Series Burner Control Loc 22?

The manual's fix and the step by step check for this code are in WERCS Diagnose, plans from $49 a month. For help right now, WERCS answers 24/7 at (877) 489-3727.

Other Siemens LME7 Series Burner Control codes

Loc 2 · No establishment of flame at the end of Loc 4 · Extraneous lightLoc 7 · Loss of flameLoc 10 · Error not relatable (application), interLoc 14 · POC errorLoc 60 · Analog power source 4 to 20 mA, I < 4 mALoc 83 · Faulty PWM fanLoc 139 · No program module detectedLoc 206 · AZL2 incompatibleLoc 225 · Faulty PWM fan

All 11 Siemens LME7 Series Burner Control codes · Every fault code