Green LED - flashing or solid?

Old 01-28-22, 02:27 PM
Thread Starter
Join Date: Jan 2022
Posts: 1
Upvotes: 0
Received 0 Upvotes on 0 Posts
Green LED - flashing or solid?

Question about led I have a heil 3 1/2 ton central air and heat pulled cover off in attic and the green led light is flashing like a heart beat my question is it supposed to flash or be solid
Old 01-28-22, 02:49 PM
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 18,874
Received 1,190 Upvotes on 1,147 Posts
Moved question to furnace sub-forum.

Mine has a chart inside the door showing what the different types of flashing and such mean - I would look for something like that.
Old 01-28-22, 05:54 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 62,102
Received 3,424 Upvotes on 3,070 Posts
If the green LED is flashing slowly.... it means the furnace is on but there is no call for heat.
As mentioned the wiring diagram and fault code list should be on the back of the blower door.

Most blower doors have a sight glass where you can look in to see the code. That's done because once you open the blower door.... power is disconnected and the current code(s) are cleared.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: