In a business name, would it be Jones Plumbing, Heating and AC or Jones Pluming Heating and AC? Do comas make a difference?

[belocally]

I am wondering if commas in a company name make a difference?

[JamesNorquay]

If you are referring to the title of the website it could be better to use lines "|" instead of commas, for example:

Heating and Air Conditioning | Jones Plumbing

Also it is advisable to keep the brand term at the end of the title and also the keep the title under 65 character including spaces.

[belocally]

I am referring to the name of the business, not the on page features.

[RobertFisher]

Brenan,

Overall, from a branding perspective I would use the commas for the name as it is more readable.  What James is saying is absolutely correct: about the line (the pipe) it is what is used to separate the business name or brand name from the page or site title in a title tag: (His advice is spot on)

Trane Air Conditioners | Jones Plumbing Heating and AC

For me, one thing I would check if this is really someone doing AC repair, is do people there search more using AC repair or air conditioner repair, etc. I think you may find that spelled out is better from search quantity point of view. But, if you think you can be more competitive around the ones with less, that is attractive too.

Hope we helped.