Heating, Air Conditioning, Fridge, HVAC/Furnace not working


I have an American Standard Model add080c936e0. I awoke and the fuse had blown to it. I replaced it and now the furnace tries to kick on but displays a blinking error indicator light of 4 fast blinks in succession.  I don't see the gas burners firing nor am I getting the circulation FAN to kick on? I have seen older posts saying that....
4 Flashes --- Open Temperature Limit Circuit
but I don't know what to try next? Can anyone help? Of course it is a Sunday and we are in a blizzard snow storm in Denver CO! Can anyone help?


Put fan at t-stat to fan on from auto, your blower fan should start, if not open blower door panel and free spin your blower wheel it may be bound up or you have a bad blower motor. Open temp. limit would be a good indication your blower fan is not running, you also may have plugged air filters . Your high limit control may be a manual resettable type . An open limit control will keep your main gas from coming on.

Heating, Air Conditioning, Fridge, HVAC

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40+ years diversified experience.An HVAC/Refrigeration Self Employed Contractor since 1986. NATE Certifield. Answer questions pertaining to Residential and Commercial Air Conditioning , Warm Air Heating, Heat Pump systems.Mechanical and Electrical troubleshooting of these systems.Be as detailed as possible when describing problem.Packaged unit or split systems.No appliance questions.


Installation and Troubleshooting, Mechanical and Electrical, in following areas, Refrigeration ( Walk In and Reach In Coolers and Freezers ) Commercial Roof Top and Packaged Heating/Cooling ( Natural Gas,Propane, Electric, and Heat Pumps ) Computer Room Air Conditoning Systems,Commercial Residential Packaged and Split Systems Air Conditoning and Heat Pumps.Warm Air Oil , Natural and Propane Gas Heating systems.

Graduated from Private Technical School in 1975. An HVAC/Refrigeration Contractor . Have Unlimited Heating/Piping and Cooling Contractor License.Limited Sheetmetal Contractors License.NATE Certifield. York Certifield Master Heat Pump Technician 1986. Served 33 years combination Active Duty Air Force , Air Force Reserves and Air National Guard in the HVAC/Refrigeration Shop/Mechanical Shop. Troubleshooting/Installing HVAC/Refrigeration Equiptment Worldwide. Retiring in 2003 as a Senior NCO ,and a Mechanical Superintendent.

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