When i asked about changing to extention of stay at pathum Thani they said they would visit. The wife said we stay in an apartment and neighbors change often they told the wife not a problem.
I'd say yes. Getting a visa would be the safest option. Someone else might have personal experience but it all depends on the immigration officer on the day when he reenters.
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.