Questions & Answers for: Nissan heat pump blows cold sometimes

...heat only blows cold air. Only after I start driving will it begin to blow hot air. I noticed that it seemed to work sometimes depending if I was parked on an incline or decline. The coolant levels ...

...pump. car ran for 20 min GOOD and again no heat ,upper hose hot and lower hose cold, funny thing is that ,that the temp is fluctuating very easily . highway driving brings temp sometime down and any ...

...pump. Do you get good heat from the heater? Check for flow from the water pump. The water pump moves the coolant through the system. Common ailments broken belt, clog in the system and mis reading on ...

...pump.thermostat ...car was running good for a week then sudeny no hot air inside(blows but cold) and 10 minutes later overheated ...coolant lvl looks fine but lower hose is cold ...when i squeeze it ...

...pump needs to be replaced. I have seen a worn impeller. It was badly corroded because the correct mix of water and coolant had not been used. Low Oil Level Most people forget that oil also helps to ...