Constant start and stop of fans in intervals of 2-3 sec

On a brand new dell precision 7730 notebook I observe the following problems - Fans start and stop several times in intervals of 3-4 sec making loud exhale noise that interrupts my and my colleagues work. Could this be normal? I have the latest BIOS, all updates, drivers, Dell Command Power Manager. The notebook is new and there is nothing blocking the air flow. This happens on very light CPU load 3-5% and no GPU load. I have had three other precision notebook m6800 and 7710 and there was no such problem with them.