DAC drops out when Furnace starts or stops. HELP

If the audio system, the furnace, and the water heater are all on the same AC phase, I believe there is a good chance the problem would be resolved if you were to have an electrician move the system's dedicated line(s) to the other phase (i.e., to a breaker on the other side of the panel).

Good luck. Regards,
-- Al

I agree with Al, that's exactly what I was thinking.
If you are familiar with electrical wiring, it should be an easy task.

What are you using for a digital cable? Length?

Try a different digital cable.

Make sure it is at least a 1.5 meter long.
.

good suggestions. Thanks. I will look into it tonight and report back with results.

OK, so I started by changing the digital cable (it was the easiest). I had been using an Audio Envy cable that I really like. Had it about one month. After inserting it into the system I had an occasional drop out but didn't think a lot about it. However as the cold nights came I started having more and more drop outs. Which lead me to tracking down the cause. Thus I discovered that it was the furnace and water heater making the disruption. Prior to the cold snap, it was only the turning on and off of the water heater that caused the drop out. But now with the furnace in the mix the drop out rate was increased signifigantally.
I replaced the AE cable with a Grover Huffman digital cable and last night experienced no drop outs.
The AE cable is only one meter while the GH cable is 1 1/2M.
Is it the length of the cable that could be the culprit or is it the design/construction differences?
Either way, thanks for the suggestions to get the gremlins out. I will also look into the service panel today to check the wiring as to which leg of the mains might be in common.