This may be a question for another message board but I thought I’d ask.
We installed a replacement furnace in my house and can only get 7" of water column on the manifold side of the valve. The install manual says it needs between 10" and 12".
Local rep says the valve needs to be replaced…we replace it with two new ones…still only 7" of water column with none of the valves adjustable (tighten screw or loosen and no difference in pressure).
We put a newer model of the gas valve on, per the local rep, with no change in performance.
Local rep then says he called the factory and they say run it with the nice blue flame we have and forget it…I am wondering.
What say you?