Then I have an LG split system that is 9 years old it's been used less than 30 times fair dinkum about 2 years ago it got a C5 error now I'm getting around to fixing it I sent some photos to the approved LG repairer who is far away on the south side they responded by email as below (yet have only seen photos). I am not sure whether or not to replace it or have them attempt a repair "A C5 fault is a communication fault between the indoor and outdoor units. To supply and install a new indoor and outdoor pc board would be $765.80 incl. GST however the technician will need to investigate what has possible taken out the pc boards, the outdoor can be taken out by the condenser fan motor (additional $124.00 incl.) or the eev coil (nil stock and discontinued). Our charges are $90.00 plus GST per hour, (travel & time on site) minimum 1hr charge. Please note that when these parts are fitted and the unit is tested other faulty parts may become apparent. These new faults are not included in this quotation and will be quoted separately if necessary; Alternatively, To remove, supply and install a new LG 2.5kw split system (P09AWN-14) would be $1,485.00 incl GST, noting we would reuse your existing ducting and that the indoor unit may have changed in the size dimensions. All new systems have a 5 year manufactures warranty." Any advice?