Suburban Furnace
We have a suburban NT 24M furnace, the board is sporadic as it will ignite the burner the odd time and then nothing. We have been told this board is no longer available either as an OEM board or a din...
Forum Discussion
Turbojimmy has a great point- you get a voltage drop across the thermostat when the contacts are oxidized. When you first turn the thermostat up for heat, there is more pressure on the contacts -> less voltage drop. You also typically get a voltage drop across the sail switch (a.k.a. air prover) and high limit switch.
The board will usually work down to around 10.5 volts, but it's nothing to loose 3 volts across those items.
If you have the original thermostat, I would change it, no question. Cheap, easy, and really needs to be done.
That said, I still recommend an inspection and cleaning.
The board will usually work down to around 10.5 volts, but it's nothing to loose 3 volts across those items.
If you have the original thermostat, I would change it, no question. Cheap, easy, and really needs to be done.
That said, I still recommend an inspection and cleaning.
