Best and cheapest way to a clean coil
We use these machines ourselves and manufacture them for sale to other air conditioning companies.
About 10 years ago we started to develop a way to clean the indoor coil without cutting the refrigerant piping, brazing, evacuating and making a mess.
It is also better for your air conditioner because there are no chemicals, just water. The sealed system is not opened. The biggest benefit for you is: it is about 1/2 the price of the old method.
Customers that, in the past, would not have their system cleaned because of the cost, now are operating at peak performance at a reasonable price.
It looks like its just a pressure washer from Lowes...and it is!
But that isn't where the secret lies. There are some custom parts we have machined and built to our specs that make this machine the only one of its type in the world.
We have been using them for 10 years for hundreds of happy customers.