En español Live Chat online. Find the most common problems that can cause a Tempstar Furnace not to work - and the parts & instructions to fix them. Indicated this may be the pressure … read more Working on our Daughters Tempstar furnace model # XXXXX The unit tries to start but after about 30 seconds it stops and the green light flashes in 3 flash sequences. I also noticed that if it is at temp in the house, it can maintain it, but shuts down when it needs to continually try to warm the house. I live in SW Virginia, which means it gets pretty hot in summer and cold in winter as we live in the foothills of the Blue Ridge. Within the manufacturers, the flash codes can be different from one furnace to the next. Your Account. :confused: Its late August, thought I'd check out the american standard freedom 90 furnace. It turns on and cycles 1 or 2 times the shuts off and flashes 3 times. I purchased my Trane in 2013 from a local heating and air contractor. Your Account. A "high limit" switch protects the furnace against overheating and damage -- it's located in the output duct, or plenum, of the furnace and turns the furnace off if things get too hot up there.The usual cause of a high limit trip is inadequate airflow -- in your case, because an apparently faulty connection was causing the fan to not run. Ive checked the airflow, and drains, and everything seems to be clear. When this happens, it can be tough to know whether to attempt a repair on your own or to contact a trained HVAC technician. Video. With a smart gas valve that flashes code 3 (low pressure switch stuck open) I have replaced the switches cleaned the furnace and inducer motor is spotless. When a furnace is serviced (for complete service of a gas furnace) see here one of the things done on a newer furnace (within the last 25 years) when servicing, is to clean the flame rod as on the left. High limits and you. View solutions. When to call a professional to repair your Tempstar furnace. I have a 95% efficient tempstar furnace model N9MSE that my wife and I purchased 9 months ago. I've checked the airflow, and drains, and everything seems to be clear. It worked fine last spring, but now flashing 3, for a "pressure switch error". It was the greatest purchase I could have made. Clean and I still get the same code what could be the problem the furnace is. Nearly every manufacturer has different flash codes. 1) furnace does not even start up, but it has power. It turns on and cycles 1 or 2 times then shuts off and flashes 3 times. Featured Video. Furnace blower runs all the time. I have a 95% efficient tempstar furnace model N9MSE that my wife and I purchased 9 months ago. If you realize that a solitary light blinking slowly - Furnace repair service heating installation HVAC ac repair heating rebate Hot Water Tanks, Boilers BC Furnace Vancouver Burnaby Surrey Coquitlam Richmond White Rock Maple Ridge Port Moody Delta Abbotsford Aldergrove Pitt Meadows North Vancouver West Vancouver I also noticed that if it is at temp in the house, It can maintain it, but shuts down when it needs to continually try to warm the house. Free repair advice! 2 possible causes and potential solutions . 14 years old and I have never ever had any problems until now any recommendations ? Gas Furnace Troubleshooting and Repair - Flash Codes. Most units will light 3 times, then go into hard lockout. Many of the failures of modern furnaces can be traced to simple maintenance. 1-800-269-2609 24/7. 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