Well, the water pump cause your heater cord to blowout cold air on your heat

Hello, first if you have a leak - stop driving until you repair it! You're not doing anything good for any part of the car by continuing to drive with a known and damaging failure. Second - if you have a coolant leak, don't expect your heater to work properly. A heater requires the engine to get to operating temperature with a fully functioning cooling system that is under pressure and forcing hot coolant through the heater core with no air pockets to be found. If you have a leak, all of that is in question - and you'll get cold air perhaps. It's hard to weigh in on "what if's" because it doesn't appear that you're approaching the problem with an intention to resolve it. I would suggest resolving the coolant leak, filling the cooling system with the appropriate amount and concentration of coolant, purging the air and rechecking all. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.