There was a question I neglected to ask in my previous note. How do I fix a situation involving a radiator. Whenever the boiler turns on and it begins to heat the system, there is a radiator that makes a loud noise as if someone is banging it with a metal object. How do I fix that? Thanks again for...

I have a Goodman furnace. The thermostat is telling the furnace to come on, but it does not. This happens at least twice a day. I have to turn it on by turning the furnace on and off. There is a blinking red light that flashes five times, which I do not know what that means. Please Help

My air conditioner keeps freezing up and usually all it needs is more freon. Now my heating won't shut off the thermostat seems to be stuck on 75* even though I have it on 70* or I think it is clicking when I pull it by 75* when I tried to get it to shut off. Is my thermostat gone bad or is it...