Siemens LME11 blinks 10 times after replacing the unit, what to check?

Question

My Siemens LME11 gas burner control is blinking red 10 times. This started right after I replaced the unit. What should I check first?

Top answer · Written by InduQT from the fault guide and manufacturer manuals cited below · Oct 28, 2026

A Siemens LME series gas burner control blinking red 10 times indicates a wiring error, an internal fault, or a problem with its output contacts. This fault can occur at any point in the sequence, often after wiring work or unit replacement. Unlike other fault codes, the alarm output at terminal 10 is OFF for this specific code.

Likely causes and checks

1Wiring error at the plug-in base or burner

Points to it: This is the most common cause, especially if the fault appeared after replacing the burner control, its base, or a burner component.
Check: With the plant isolated (all-polar), compare the base wiring with the connection diagram for the installed LME type and the burner wiring diagram.

2Fault on an output circuit

Points to it: A problem with a connected load, such as a fan motor, ignition transformer, or fuel valve, can trigger this fault, particularly if one of these components recently failed or was replaced.
Check: Have the loads on the fan, ignition, and fuel valve outputs checked against the data sheet ratings by a qualified electrician.

3Internal fault of the burner control

Points to it: If wiring is proven correct and the code persists on every start, the unit itself might be faulty, especially if it was dropped, exposed to moisture, or is very old.
Check: Siemens advises against opening or modifying the unit. If the unit was dropped, it must not be used. Replace it with the same type number.

Next check: Given that the fault appeared immediately after replacing the unit, the first step should be to thoroughly check the wiring at the plug-in base and the burner against the connection diagrams, ensuring the plant is isolated before starting.

Work on fuel trains, burners, pressure vessels and electrical equipment must be done by qualified personnel following the manufacturer’s documentation and local codes. Never bypass a safety device or interlock.