My AC runs constantly. $$$$$$ Help
Posted: Tue Aug 03, 2010 9:18 pm
I have 1996 Nordyne MMHA-090ABHR-05. The Serial # is MMH9603-00314. The blower motor and outside Coleman A/C unit run constantly unless I shut it off at the breaker box. The furnace has a Heating/Cooling swicth on the front of it just like the thermostat. Both are obviously set to cooling. The only thermostat wires hooked up are Red and White. The Yellow, Green and Blue are wrapped around and not used. I have had two service techs out before but no help. One said it was the stat. I replaced the Lux Programable stat with a Honeywell 511. Same thing. Still runs. The guy at Menards said I needed the old style Round stat. because it wasn't programable. I switched that the other day. It Still runs.The other Tech said one of the $30.00 each relays in the box behind the Heating /Cooling swith was bad. I replaced both just to be sure because he didn't know which one it was for cooling. Still Runs all the time. Then he said the R & RC need to be jumped. Tried that too. Still runs all the time.The sales person at Illinois Mobile Home Repair said it was the Fan switch. I replaced that too. It still runs all the time. I called Honeywell tech support today and the nice person could hardly speak English. He suggested to call a local mobile home repair place nearby. This months electric bill is going to be outrageous. Is this something simple I can do myself, or do I need to call a pro ? Cha Ching Cha Ching. Thanks in advance Guys !!
Mark
Mark