It is just a few unscrupulous people out there who just want to throw parts, make extra money,
(as in "Dang, that did not work, lets try something else" )
meanwhile you are paying for a part he will sell someone else.
For instance, I had a customer who paid $1600.00 for a coolant change, that was a 16 gal system. that is 8 gal. Boiler coolant, 8 gal, distilled water. Approximately a $300.00 parts cost.
Every one please feel free to call me if you have ANY doubt
Thanks