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Matthew, HVAC Technician
Category: HVAC
Satisfied Customers: 2014
Experience:  14 years experience in the HVAC field of service, installation, Manual J & D calculations
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My Ducane furnace smart valve will give 4 flashes which indicates

Resolved Question:

My Ducane furnace smart valve will give 4 flashes which indicates an open limit switch or roll out switch but none of them are open and sometimes the valve will work fine.
Submitted: 6 years ago.
Category: HVAC
Expert:  Matthew replied 6 years ago.

Matthew :

Hello, My name is XXXXX XXXXX I will do my best to help you today.

Matthew :

If the limit fault is flashing and you jump all the limits out and it still flashes then you have a bad smart valve. These valves are notorious for losing their connection with the plugs and the only cure is a new valve. Most of the time when it is in this fault you can wiggle and press on the plugs and get it to finally catch.

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