I have a Vexar (Coleman) DGAA070BDTA Furnace that's set up for Natural Gas.
Last year I replaced the Gas Valve because the Diaphragm had a pinhole in it, and it worked fine last season. Now it seems like I have another issue.
I understand what the furnace does prior to it starting, and everything works fine. It ignites fine, the blower starts, and everything starts the way it's supposed to.
The problem I'm having is it seems like it's not getting the air hot enough. I have air coming out of all the vents in my house when it turns on, but the air comes out cold.
I'm under the impression that the air passes by the "box" that houses the flame, heating the air on it's way into the ducting. Is my assumption correct?
At the furnace, there is a metal panel that's positioned just below the "box" that contains the flame. I removed this panel then started the furnace. I'm under the assumption the air at this point should be reasonably hot in order for it to arrive at the various ducts in my house warm.
It's barely even warm at this point.
It's my opinion this is where the problem is. I can't expect anything resembling warm coming out of the registers if where the air get's heated is not that warm.
What can cause this? A partial clog in the gas line? The valve appears to only gave two positions; open and closed, and the only way I can see to get things hotter is to increase the amount of natural gas that goes into the furnace.
Am I full of hot air?
Thanks in advance!