potterton powermax always on lockout.!! ?

if your lockout it should show a error code,if its showing A15.you my have a leak check your Discharge pipe out side for water dripping if water is present checkyour TPR valve there is a tundish below it check for water if water is present you my have a problem with the relief valve.if you could tell me wat your erro code is i would have a better understanding wats going on

mjm fix it
March 2011