Recent content by Bdog

Well, well well. Thanks to Bud16415 I went once again in search of the source of lower voltage and found perfect 120v at the breaker box, then went into the attic Junction box sending power into the unit and found that the positive wire had slipped out of the back of the light switch in that...

Went ahead and checked tightness at the breaker. No issues. The furnace is the only thing on that breaker so I'll check the voltage at the J box switch in the attic next.

That gets me a little nervous, opening up the breaker panel and poking around with a screwdriver. Finding the hot on that breaker isn't an issue but since all the commons tie into a master common track I'm not sure if I can identify the right one. Any advice?

I would think yes, depending on where the turns are in the vent line. That's why i like bringing in a blower and blowing it all out from the inside. You will see any debris on the ground outside afterward.

Well, solved. Sort of. Two HVAC techs were here for two hours, heard my story and tried a 3rd transformer of their own. Tried all the trial and error I did, and more I assume but left just as stumped as I was. After they left I ran an extension cord from a different electrical outlet in the...

Gas furnace by the way, not that it matters. Board has a 5a fuse, it's good, but again it doesn't matter because I've connected the power directly to the transformers without going through the other components. And since I've rested the transformer on certain parts of the unit while trying all...

All good suggestions, but now I've bench tested both transformers, verified both good, then connected both independently to the power coming into the unit and both have no secondary voltage. Strange, I'm bypassing everything, door switch, circuit board, etc. and get a fine 110v reading before...

Will try the light bulb, but after trial and error the last 30 min. I'm still confused and baffled. Bench tested both old and new transformers, perfectly fine. Test power into the furnace, no problems. But even when routing power directly into the transformer getting nothing out the secondary...

Thx bud16415. No, secondary not connected to the control board for the reading. I tested secondary both with the wiring leads, and without, to eliminate the wires as the issue. That's why I'm baffled.

Reconnected the old transformer and no voltage from the secondary, same issues. I'm stumped.

....meaning from the inside, obviously. Just detached the vent hose from the dryer and stuck the blower inside it while wrapping a towel around the blower nozzle and larger vent hose to keep the pressure going outside.

The 108v reading is from the xfmr leads out of the control board. So power is flowing through the board but the 24v back to it is not present. Will reconnect the old transformer and see if it makes a difference and post the results.

I've actually attached a leaf blower to the vent and blown out all sorts of lint to the outside. It's a bit noisy especially if you don't have an electric blower and only a gas powered one.

My Trane inside unit died, No blower or even power light on the control board works. I started by replacing the 115/24v transformer, then replaced the control board. Still nothing, not even the indicator light on the new board. I show 108V going into the primary of the transformer, but 0...