Hi, i have an old trusty Rinnai Flame Fire Inbuilt Royale Gas heater model IB35R. I just need to remove the fan as it is making lots of noise and occasionally stopping. I reach it give it a quick flick and it goes again, for a short time.. I need to replace it but cannot work out for the life of me how to get to it.. i think its from the front after taking the logs out but cant quite work it out. Can you please direct me to a Service Manual or explain how on earth i get to the fan. Many thanks