Ducane 20kw furnace with heat pump/ as long as the outdoor unit is running the indoor unit runs fine. If the outdoor temp falls below the setting on the outdoor units outside stat the 30amp breaker to the furnace breaks. Pulling 21amps. on the circuit when the outdoor unit is running. The wire is 10-2 w/gr. The 60amp circuit will pull 42amps or 21 depending on the number of strips that are on. It is on 8-2 w/gr. The unit is new. Of course didn't have the problem till outdoor temp dropped enough to show the problem
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1 do you have a program or mercury buld mercury bulb.is usally a adjustable heat anticipator which a digital is fixed I recommend a digital t stat but also be advised that mercury bulb tstat are really phased out you could also have a issue with your main limit inbetween the heat exchanger wheather it is a cam stat or a normally closed limit but being a new furnace its more likely to be a n/closed limit will open if there is to much heat in supply box above the evap coil.you would need to take your delta temp reading within manufacture specs..or call aca or your local hvac company 770 932 8990 ask for mr.blaine to schedule your appointment today or are office staff thanx.
Did this happen after you cleaned or did maintenance? If so check to see if your unit has a temperature control that was moved. Check your manual for its location. It maybe "thinking" it is too hot and shutting down.
A short cycle heat cycle indicat a pressure switch replacement was needed. This did not fix the problem. the problem was in PCV line since the end was filled with slugs and cause the line to backup with water. When this happen the system would stop asking for gas. the water would leak out and it would restart. The problem was fixed by cleaning value at end of PCV. This released the water, two quart of water, that was back up causing problem. Curious if a filter change indicator was providing a clue that was missed?
Remove the 2 grill wire cooking racks by lifting them out of the top of the grill, next lift out to remove the 3 heat deflector panels which exposes the 3 burner tubes. Remove the 4 screws located on the outside flanks (2 on each side) of the 5-knob control panel assembly - then gently slide the knob control assembly outward and away from the grill just about an inch or two. You can now remove the old burner tubes and replace them with the new units. Then simply slide the control assembly back into the grill frame and replace/tighten the 4 screws. Voila`