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View Full Version : Why does the red light blink constantly on Coleman 7681-8171/B

MTSec
Feb 6, 2014, 06:35 PM
Why does the red light blink constantly on Coleman 7681-8171/B
Grady White
Feb 7, 2014, 08:05 PM
There should be a label on the furnace or possibly printed on the board itself describing the blink codes.
ma0641
Feb 7, 2014, 08:25 PM
Some heaters blink 1 slow blink to show the heater is OK.