Think you may need to take a comprehensive approach to fixing it, as it may have more than one thing wrong with it, especially if high mileage. First, remove and test ECT, replace if bad. Same for thermostat. Check water pump is actually providing good flow. If coolant isn't reaching ECT then that may explain why it (and fans) aren't working, so again check coolant flow, upper hose is return from engine, bottom hose is feeding water pump, so no coolant flow out of engine means a serious blockage or bad pump. If you want to avoid an expensive engine rebuild, avoid letting engine run too hot too long. I don't have a manual so I couldn't tell you if water pump shares a cover with timing chain or if it overlaps oil pan, as it does on so many similar models, so replacing timing chain(s) is often done at same time as water pump. Good luck.