The fuse will literally pop out when this happens. I ended up replacing the thermostat and wires as well and now the AC side works perfect but when it is changed to heat it blows the 3 amp low volt fuse and heat will not work. Air Conditioner Compressor Protection Delay Timer, Capacitors for Central Air Conditioners and Heat Pumps, 370VAC Dual Rated / Oval Motor Run Capacitors, 440VAC Dual Rated / Oval Motor Run Capacitors, Condensate Pumps for Central Air Conditioning and Heat Pumps, Condenser Fan Motors for Carrier In the Round, Contactors for Air Conditioners and Heat Pumps, Contactors for Goodman Air Conditioners and Heat Pumps, DRV-102 Trane Variable Speed Compressor Drive, Freezestat for frozen air conditioning coils, Electric Furnace Heating and Air Conditioning Parts, Hard Start Kit for slightly stuck Air Conditioner Compressors, Hard Start Kit for stuck Air Conditioner Compressors, 0131M00429S Goodman 1/4 H.P. Remember, you are working with 230-240 Volts here! A heat pump that doesn’t turn on is a fairly common and easily remedied problem. NEWS Many times the thermostat wires will short out against the body of the furnace or air conditioner. Before checking your outdoor compressor unit, turn off your … LEAVE A REVIEW SERVICE AREA Introducing the Total Line Wireless Thermostat! 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This is the tripped breaker. The outdoor unit blows air over the refrigerant coils, and if there is an obstruction or malfunction with the fan motor, it will lock up. There are many different types and colors of these boxes. After 22 years, the original Fan Relay went bad (condition: relay stuck in the closed position causing fan to run 24/7 as if in Fan ON mode). But if it trips again, you should leave the power off to your heat pump and call in one of our AiRCO Heating & Air Conditioning heating, ventilation, and air conditioning (HVAC) professionals to diagnose the issue. High Temperature Silicone Sealant, 0131F00020 Goodman 1/3 HP Fur Mtr S89-807, 0231K00034A Amana 1 H.P. CAREERS REQUEST ESTIMATE Plumbing License # M37961, San Antonio Office The Lil Popper allows you to manually reset the fuse instead of replacing a fuse … Overvoltage. 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