No heat

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Ah, the dreaded cold air when you’re expecting a toasty cabin—it's like ordering hot coffee and getting iced instead. If your 2004 Acura TSX is blowing cold air even when the heat is cranked up, let's start with the basics. Check the coolant level; low coolant can prevent the heater core from doing its job. Since you mentioned it gets better with acceleration, it might be a sign of a weak water pump or a partially clogged heater core. It's like trying to drink a milkshake through a clogged straw. Also, make sure the thermostat is functioning properly, as a stuck-open thermostat can keep the engine from reaching optimal temperature. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.