関連ワード:  error code 224 worcester boiler    error code 224 worcester    worcester bosch error code 224    worcester boiler error code 224 reset    worcester greenstar error code 224    worcester 8000 error code 224    worcester bosch boiler error code 224    worcester greenstar 8000 error code 224    worcester bosch greenstar error code 224    worcester 224 error code no heating