You are overwatering.
Ten minutes per zone, 2-3 times a week, (I think only twice a week is technically allowed) depending on rainfall, should be more than enough. If it rains a lot (pardon the pun) as it does during daily summer thunderstorms, even that is too much. This also depends on the type of sprinkler heads you have.
Your lawn is dying from root rot. It is brown because it is dying, not because it is too dry, but because it is too wet. The roots can't take in the fertilizer because they are rotting. Yes, you may need to replace some areas. Over watering also invites disease and insects.
Look for yourself... Which neighbor has the nicest lawn? Now go to this link.
https://accessmygov.com/OnlinePaymen...pe=10&uid=2523
- At bottom of page enter just your street name (not your whole address)
- Click YOUR address
- Halfway down that page, click "View Additional Account Info"
- Now check out the graph at the bottom of the resulting page. Then look at your "nicest" neighbors water use graph. Very likely that you are using far more irrigation water - if the lots are of similar size.
To adjust your irrigation timer, don't depend on landscape people. They're not paying for the water or the replaced sod.
Adjust it yourself by learning how it operates. Your owners manual is online as well as YouTube videos.
Pay special attention when adjusting to understand the "Solar Sync" portion which cannot be overridden by that bypass switch, nor would you want to anyway. Your irrigation timer (Solar Sync) sets a new watering percentage as needed every night.
It will take time for your lawn to come back, but adding slow-release granular fertilizer and not overwatering should do the trick!
Good luck.