Q: Coolant

Hello. Typically in a circumstance such as this, a mechanic would pressurize the cooling system when cold, so as to allow up-close inspection, and identify the leak. A non functioning cooling fan can cause overheating which indirectly could cause coolant loss as the overheated, pressurized coolant blows past the pressure relief valve in the radiator cap. That mechanism of loss occurs mainly when the "cold" level of coolant in the recovery or overflow tank is already relatively high and thus there is no space for excess liquid coming from an overheated system. In any event, if you are loosing coolant you may have a leak that will be discoverable once the system is pressurized. If you’d like, a YourMechanic certified technician can perform a coolant is leaking inspection on your vehicle at your home or place of business.