Quote Originally Posted by dogin View Post
Contact Steve at Thermochill with your problem. I have three 120.3 rads and did like one mentioned (hooked up a garden hose using an adapter to a sink and ran hot water for about 10 min and flushed it with distilled. It runs clear).
I did contact him at the start of the year and he said to use vinegar, but I'm really reluctant to put that stuff in my rads.