Woke up to a cold house

So far so good. The house temp is above what the thermostat is set to, so the furnace won't run for that, but it does fire up occasionally to heat the water which I heard several times today.

This is the invoice I received after the first technician visit after which I started having problems. I understand that ATU means "annual tune-up", but I don't know what the other two items are - probably parts.

furnace bill2.jpg
 
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