Overheating with no loss of coolant

This could be a few things like a blocked radiator but this is definitely going to need a hands on inspection by a professional to know for sure. I'd like to say its low on coolant and there is likely a leak but that doesn't make 100% sense with how you describe it. You can check the basics like coolant level, fan operation but in the end you may need this link to shops in your area. https://repairpal.com/repair-shops Alex