After owning and living with a Mitsubishi mini split system I’ve learned they require in depth cleaning of the fan wheel which unfortunately requires disassembly of the unit. One of my two units has developed a“dirty” fan that is not from dirty air but it’s a “moldy” growth that collects on the fan and coils due to the dampness from humidity removal. The cost is expensive and may require more that one service tech to safely perform the service.

Who do you use

I put one in my 3 car garage in January and it is really nice to work out in the garage this past week, I can drop the temp as far as I would like. I insulated above the garage with the company that did the installation. I insulated my doors myself. I would recommend Kalos out of Clermont. They did a great job for me.

Air Conditioner systems are sealed systems with motors that never need oiled or serviced. Two points of cleaning for personal maintenance are to put vinegar into condensate drain to keep clean sentiment if not used for a period of months which in Florida is probably rare and also clean the outside condenser coils with a hose spraying from top of each side down toward the ground. The only time you should be paying for a service call is if the unit is not working properly. "If you invite a fox into your hen house eventually it will eat your chickens." HVAC service person for over 20 years...Energy company service worker for 37 and counting.

Humm, our AC contractor has never told us about HOT WATER down the line.... always been told 3/4 to 1 C. of white vinegar EVERY month ? And change filters every 2-3 even if they DO NOT "LOOK" dirty. Hot water hu ? and does not have to be every month ? Going to ask them about that and see what they have to say....LOL... maybe they have stock in Heintz....LOL ?

The hot water recommendation is from Munn's, one of the largest HVAC contractors in The Villages. Check out their website. I use a gallon of hot water (not boiling) at least every 2 months or so. More often may be better. I know that some technicians recommend vinegar, but others say that it can interact with the HVAC unit and the piping. There doesn't seem to be a consensus either way. Most companies do not recommend using bleach. But, I think it is a mistake to depend on an annual maintenance service to address the condensate drain and the filter, like some homeowners do.

OK, follow me. I have a mini split. I am going to install 12 years ago and I paid $5400. I recently got a quote for a new unit from SunKool for $7800. I’ll be getting some more quotes.

When you get more quotes, make sure you are comparing units with the same capacity in tons and/or BTUs.

$5,400, 12 years ago, and $7,800 today both sound too high, unless this is a high capacity unit.