Home>Discussions>INSULATION & HVAC>Lennox Furnace fuse (3amp) blows when turning on vent fan
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Dan
Lennox Furnace fuse (3amp) blows when turning on vent fan
Dan

hi there,

my furnace is blowing the 3 amp fuse (Lennox g43uf furnace) when the switch for the “vent fan” is pressed.  Any suggestions on what to look for and how is the switch supposed to be wired?

thanks in advance!

Jack
Re: Lennox Furnace fuse (3amp) blows when turning on vent fan
Jack

Your color coding is a little confusing. Why do you have a jumper on the furnace from the "Y" terminal to the "G" terminal?

Jack

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