Coolent low every 3 months is that a hose problem but car is not overheating

Sure, this could be a leaky hose but saying that won't help you much. What you need is a complete diagnosis. If you want to do this yourself you need to start with a pressure coolant tester. You can rent these at auto parts stores. If you don't know how to use the tool or look for leaks here is a link to find a shop near you. https://repairpal.com/repair-shops Alex