I have a contract with Alliance Climate Control, whereby they come to my house every 6 months to service the 3 air conditioning units. They are a very efficient business. Firstly, I get a reminder email from James to remind me of the 1/2 yearly service, and offering a suitable date for that to happen.
Secondly, i can't speak highly enough about the technicians that come to the house to complete the service. They are always polite, neat in appearance, efficient, and when necessary offer advice on things that need to be done for the units to operate at maximum capacity.
The last guy here was Alex, and he was outstanding. He said we needed a gas top up, and this was done on the spot. Furthermore, he reported back to James that we should instal better filters for our downstairs filters, which we are going ahead with.
This is the sort of service that is sadly lacking amongst other trades nowadays. Good, honest, reliable, service at the right price.