Heat or Air won't turn off from Thermostat

tdsilk

Hilarious - lmao

thermal-medics

looking back at Taters post on 2/28 about bare wires.... gotta be a grounded out wire (bare, touching something) or the way you are hooking up the tstat. Maybe shut off power to the air handler/transformer after changing fuse then hook up t stat and repower it up. pull a little wire from behind the tstat and check it out and also at the air handler where the t-stat wires enter/are.

snap

tdsilk

New development. Me and a friend have determined that when connecting the black wire to the "C" port on the t-stat it blows the 5amp fuse.
Leaving this wire unconnected allow the system to run normal. At least so far... Any idea why the black wire is doing this? By the way, the
t-stat on my upstairs unit has the black wire connected. However, it's an old weather master t-stat.

hvac5646

They aren't connected to the same length of stat cable are they?

tdsilk

Fuse mystery solved. Either that or the hex has been lifted:-) Appears that with this particular type (Honeywell RTHL2410) of t-stat
the black wire is not needed. It clearly (well maybe not clearly) states that if your old system used an "O" and "B" wire connect the "O"
wire only. Tape the end of the "B" wire and do not connect. So far so good! The system has been running normal since last night. I also
learned that my system prior to last night was running off aux heat. I say this because the heat pump would only turn on when the AC
was on. Now the heat pump is running and the house heats up faster. Hopefully, this has fixed the problem and I would like to thank all who
offered assistance.

Troy

thermal-medics

You mean all that drama because you didnt read the fine print????

Just messing around with you. Thats awesome, you probably learned a ton going through all of it.


Im sure your feelin good, enjoy it, unitl the electric bill shows up...... you can put the $220 toward it maybe.

good luck

tdsilk

Yes, that was a day or two of drama with the new t-stat. What's funny is I work in tech support and often times run into problems customers could have
easily solved by reading the manual a little closer. I definitely have a better understanding about how the system works now.

hvac5646

gregzoll

I can top that. It took someone to come over and swap the input on one of co-worker's monitor. All day she sat there thinking it was shot.

The lcd screens we have are widescreens with two video inputs.

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