Note a standard booking flat rate booking fee applys to all call backs if it's a genuine warratee call a full refund will be given back to you . If we have worked on you wet radiator system please make sure all you radiators have been bled. Timers and clocks are set correctly. When Booking please fill the note,s section with as much details as possible. Tell us what you have done to try and solve the problem. If we discover a user error we will charge you our normal rates .