The diesel version is a common piece of equipment on OTR trucks...I have many years of experience using them. They are used in OTR trucks at all elevations and latitudes. These units do not 'cycle' in the conventional sense, they 'modulate' the heat output to match the conditions.
When first turned on, they do a diagnostic self-check and then blow cold air while clearing the combustion chamber, then the burner comes on and it will fire up to maximum heat and blower speed for a few minutes.
After the interior sensors determine that the inside air is approaching the set temp, they will 'throttle back' and run at a very low speed and heat output to maintain the interior temperature right at the setting called for on the control panel.
This way you don't have intermittent blasts of cold or warm air or changing noise levels all night long.
I would assume the gasoline versions work the same way but I have not verified that.