Good morning INSTALL MY CALEFONT IN MY PLOT HERE IN THE SERENA IS NEW BUT TUBE STORED FOR 1 YEAR APROX IS A SPLENDID CALEFONT 13 LITERS OF 2 HANDLE GAS AND WATER CONTROL MY PROBLEM IS INSTALLING IT ALL WORKS EXCEPT A SMALL DROP THAT DROPS UP THE MICROSWITCH IN ORIFICE YOU HAVE TO ACTION THIS MICROSWITCH WHAT COULD BE THE PROBLEM REMEMBER IS NEW THANK YOU VERY MUCH