On Nov 6, 4:40 pm, N8N wrote:
On Nov 5, 10:50 pm, wrote:



On Nov 5, 10:20 pm, "Zyp" wrote:

wrote:
On Nov 5, 8:31 pm, "Bumpy" wrote:
Any ideas about what could have gone so wrong, so quickly?

Follow your thermostat wires and they will probably go
into the air handler, if your have power to the air handler, then
you will probably have to open it up. The themostat wires go
into a circuit or panel to pick up the 24v, and there might be a
fuse in there that popped, or you might see the bad transformer in
there. You might even have a thermal ckt breaker trip on youre blower
motor, which might have tripped from overload due to a clogged
filter.

Just my 2 cents!

In reading the schematic it does show a 5 amp (auto type) fuse, which
I also would definitely think might be bad too, no idea why it would
have gone bad though.

phil

Phil;

Control transformers do not go out on their own. Somthing must short out
the connection and cause a failure. Check the 5 amp fuse. If it is blown,
you've got somthing that may be shorted. There is a line running to your
new outdoor unit that should have from 5 to 7 wires in the cable. If the
installer mis-wired the control board, he could have smoked the transformer
on the call for heat. Or, he could have mis-wired the defrost cycle wiring.
When the outdoor unit called for defrost, it signals the indoor unit to
energize the auxilary heat. So you should mention to your installing
contractor that maybe there's a problem and that he shouldn't charge you
until it's decided what the actuall failure is.

--
Zyp

Zyp,

As it now stands, the installer of the new heatpumpis coming out to
look at it. I went with him because that's the only source i would
have for any warranty work if the new heatpumphad gone bad (or
possibly had been miswired). But if had been miss-wired wouldn't the
problem have occurred within the 3 weeks its been running periodically
for heat?

phil

Is it possible that when it stopped working you went to "emergency
heat" which would be likely an electric resistive element in the
transformer? That would be one explanation as to why it worked fine
on regular heat for a couple weeks and then suddenly failed. Did it
get significantly colder in your area immediately prior to the
failure? That would explain what you describe, and also point to
something shorted that would only show up when the thermostat called
for the auxiliary electric heat to kick in.

nate

If this is a miswired thing, and the company that may have miswired it
is coming out to check the system, and the 8 mo old heat pump they
installed, then I'm worried if they will try to 'cover up' the
miswiring and say it was something in the air handler instead.

I should probably take a pic of the wiring at the heat pump before
they get out here today.

I just don't trust people anymore, its sad.

Phil