How to reseed after fertiliser burn?

Happened about 2 weeks ago. Been drenching the patches with water but some haven't yet shown signs of regrowth despite the rest of my lawn growing ok. Should I leave it another month till I reseed and give it more time to recover and the fertilizer to wash away or act now before the moss and weeds take over? Don't know how long it takes to recover or show signs that it's not dead. Is there any way of telling this soon if it's a write off or do I need to wait 6 weeks before deciding? I'm keen to get it repaired as soon as possible what with autumn just around the corner and the chances it may not germinate in time before the cold weather sets in.

Also want to know what the correct procedure is. Do I have to dig or rake out all the damaged grass first or overseed and hope the new seed fills in between the brown stuff? I also don't want to reseed if the ground is overdosed with fertilizer and risk killing off any new seed before it's had time to germinate. How do I know when the right time is?

I've been advised to overseed in October but not sure how to deal with the burnt patches.

 

Not quite the same thing, but I once accidentally mowed my lawn on scalp mode, ie the cut was so close that on the less than perfectly even patches, the mower took us right down to bare soil.

All I did was scattered some seed over it and kept it watered. It came back in no time.

 

You could try a test patch now. Put some seed down on one of the smaller patches mixed with some topsoil or compost and keep it watered. If you see growth in a couple of weeks then you will know how to proceed with the rest. Also, by that time you will know if the other patches are showing any signs of re-growth.