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Tell me how you currently have it wired and if you remember where wires went on old thermostat
Sorry, for some reason I did not see your reply.Are you saying your Ecobee has both a W1 and W2?
If so disconnect wire to W1.Connect the old W2 wire to W2.Tape the old E wire off
Try connecting to W2 instead of W1 and see if we get backup heat
Are both white and brown hooked up in air handler?
No hurry,At your convenience
Ignore last comment about burners,that was for someone else.
The brown and whites look like all going to elements. Should be getting aux heat.
I would suspect f a fuse the fan would not run either. Lets do this.Go to thermostat and connect the red and white together and see if we get heat strips to work
Fan should get energized through heat sequencer in heat mode, not thermostat
OK that answers our question. There is nothing wrong with the Ecobee. Elements and fan should have come on. Reconnect either the white or brown (doesn't matter which ) at thermostat and close it up. The problem is in air handler.
Now does ac or hea tpump work?
OK do you have a meter to troubleshoot? For some reason sequencer is not energizing elements and blower in the aux/emer mode.
Not a problem I am here most every day.We will start by checking to see if we are getting 24v to sequencer col.