Additional Water Pump

[pete white]

hi, i just changed my additional water pump (coolant run on pump) as i no longer heard the faint humm after switching ignition off, also aux heater wasn't starting up. this is the second one in 4 years. anyhow the aux heater still isn't coming on. do i need any faults clearing via vagcom. As said before i changed the last one myself and heater started straight up. Also have had 3 glowplugs fitted over the years and wasn't any need for vagcom. i am just trying to rule this out before forking out for another glowplug. but there wasn't the usual bellowing out of smoke from a dying glowplug this time. this is why i am hoping it is just a fault error that needs resetting. does anyone know any decent vagcom specialists aroung burnley/blackburn way. thanks