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Heating, Air Conditioning, Fridge, HVAC/American Standard furnace problem

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Question
Hello I have and American standard furnace
MODEL CDB1B100A9451AA

I can hear the furnace turn on
in will run for about 60 seconds and then shut down and not blow heat

it will repeat this cycle 4 or five times then work great for a whole day and then  start acting up again always in the same fashion

I noted sometimes the led will flash 4 times and will do that
about 5 or 6 times then go back to a steady slow/normal flash


im lost ...... my manual says 4 flash's is limit switch error

how ever since its and intermitant error im not sure what stepd to take.?

Any advise/ guidance is greatly appreciated  thank you

Answer
Roy,

If your furnace is starting ok but shuts down after one minute and you state the " not blow heat " to me your blower fan is not coming on , and tripping on a high limit. You can put the blower fan to the ON position from the auto ,your fan should run , then let your heat run as normal. To me you may have issue with your fan Time delay relay. Suggest calling for service.  

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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.

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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.

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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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