York 80 with flash code 4 and flash code 8 - http://www.hvacmechanic.com/ Forums

Original message

needheatguy

69.47.185.61

"York 80 with flash code 4 and flash code 8" , posted Sat 3 Feb 08:14

I have a York Diamond 80 which is having problems keeping the house warm. I have noticed that I'm seeing the flash code 4 and flash code 7 through out the day. The furnance is running constantly and blowing cold air a lot. It fire up and hot air comes out after the lock peroid is over but it is hit or miss and the furnance is having trouble keeping the house warm. HELP

Replies:

bubbad

72.94.7.132

"Re(1):York 80 with flash code 4 and flash cod" , posted Sat 3 Feb 17:03

Let's start with the 4 flash - open high limit. Usually due to a clogged filter, or blower motor not working properly, and furnace is overheating.

Check your filter first.

bubbad

yuri

24.79.131.223

"Re(1):York 80 with flash code 4 and flash cod" , posted Sat 3 Feb 11:49

Can you find a sticker with what those codes mean and let us know. It may be on the back of one of the furnace doors or written in the owners manual.

Yuri