- F.28 No enciende: fallo en el arranque Thema Condens 25 -A / AS 25 -A / AS 30 -A
- F.22 Falta de agua o presión baja Thema Condens 25 -A / AS 25 -A / AS 30 -A
- F.29 Se apaga la llama con la caldera en marcha Thema Condens 25 -A / AS 25 -A / AS 30 -A
- F.20 Sobrecalentamiento: limitador de temperatura Thema Condens 25 -A / AS 25 -A / AS 30 -A
- F.32 Fallo del ventilador Thema Condens 25 -A / AS 25 -A / AS 30 -A
- F.27 Llama detectada sin gas Thema Condens 25 -A / AS 25 -A / AS 30 -A
- F.62 Fallo de cierre de la válvula de gas Thema Condens 25 -A / AS 25 -A / AS 30 -A
- F.00 Fallo en la sonda de temperatura de ida Thema Condens 25 -A / AS 25 -A / AS 30 -A
- F.01 Fallo en la sonda de temperatura de retorno Thema Condens 25 -A / AS 25 -A / AS 30 -A