My Panel heater is displaying error code 2. What does this mean?

Applicable to models:

TPRIII050E TPRIII075E TPRIII100E TPRIII125E TPRIII150E TPRIII200E

NLPH075E NLPH125E NLPH150E NLPH200E NLPH300E

VAPH075 VAPH125 VAPH150 VAPH200

DESPH050E DESPH070E DESPH100E DESPH125E DESPH150E

AC6545 AC6546 AC6547 AC6548

CEP500E CEP750E CEP1500E CEP2000E

QRAD050 QRAD075 QRAD100 QRAD150 QRAD200

Issue: Error code 2 displaying

What this means: Open window detected.

Action: Firstly close any open window. If error still displays follow the below-

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