furnace thermostat set off carbon monoxide detector?

A wall thermostat is an electrical switch ( or a set of switches) so no a faulty t-stat will not trip your CO detector. DO NOT HORSE AROUND, if the CO detector is going off you need to assume the worse and call the fire dept, or a furnace contractor and get the furnace and hot water heater checked for a CO leak. CO can kill you , and is tasteless, oderless and invisible.

A fireman won't fix the project, a repuatble HVAC/Plumbing Co might have the equipment and understand a thank you to analyze for CO same by way of fact the hearth branch yet in addition fix the project if there is one, additionally propose procuring a stable CO detector, uncertain the place you bought it yet Walmart and those putting on the tip caps on the convience save may well be the final ones i might purchase.

A fireman won't fix the undertaking, a repuatble HVAC/Plumbing Co would have the equipment and know a thank you to ascertain for CO comparable because of the fact the hearth branch yet additionally fix the undertaking if there is one, additionally propose paying for a robust CO detector, undecided the place to procure it yet Walmart and those striking on the top caps on the convience shop may be the final ones i could purchase.

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No. Your furnace needs a service or the flue is damaged. It isn't venting properly. Don't delay, its dangerous.

your furance is vented ;if it stop's working ;it will shut off.replace your batteries. 65