Alternate blinking upon start up with the Lennox Merit.Post created: 2014-08-26 Type of Equipment: Furnace Views: 526
This question was created on the page: https://www.furnacecompare.com/furnaces/lennox/merit.html.
On 2014-08-27 Danielle wrote:
If the lights are an alternating slow flash then it could be Watchguard 1 hour −− burners failed to ignite or lost flame 5 times during single
heating demand. If the lights are an alternating fast flash then it could be Improper main ground. OR: Line voltage below 90 volts.
To see more on the diagnostic codes see page 44 in the manual (https://www.lennox.com/pdfs/installation_maintenance/Lennox_ML193DF_IOM.pdf)