Ok. I can turn the thermostat to 72 and it will stay on 64 with the fan blowing constant. Burners aren't firing. On the control board for the furnace, there is a trouble shooting light that blinks to tell you what is wrong. It blinks four times which indicates an "Open Limit Switch", and it tells...

I have a two year old Goodman unit that does not cool properly. The suction line does not get cold - barely slightly cool. It is a 3-ton high efficiency unit with a 5-ton coil. The orifice size was changed from a 74 to a 73, which is now the recommended size. The pressures were 72 and 190 on a 90...

I have got an old furnace I am going to have to replace eventually. I was looking for general advice right now what I should know when finding someone to replace it. I don't want to get into a situation where it will cost me thousands of dollars when I don't need to. I have a gas furnace with hot...

I understand how ot wire abasic thermostat but on my Goodman I have OTC-OT1-OT2 & OT3. What are these for?