My Frigidaire side-by-side is 7 years old and both sections still cool properly but the air circulation fan starts and stops virtually continously.If the fresh food section is disabled the thermostat for the freezer section operates the fan properly,it comes on and runs steady.If I enable the fresh food section by calling for lower temp. on the fresh food thermostat the fan goes in to its painful stop/start (apx 20 times a minute).My test with the freezer has eliminated the fan as the problem and in desperation I replaced the damper motor and flapper in the fresh food section so I'm sure of it.The only two control devices left are the fresh food thermostat and it seems to maintain a relatively even desirable temperature in the fresh food section leaving only an electronic "defrost control module" that everything seems to run into electrically. Question: What is causing my air circulation fan to cycle so rapidly upon call from the fresh food section for cooling? Any tips will be greatly appreciated. Eldon

Did you solve this problem? What was the solution? I am having the same problem with our Frigidaire side by side, PN PLHS269ZCB3.