Q: Nissan Pulsar 2015 heating problem

asked by on October 19, 2016

Hi, I have problem with heating. When I start the motor, an hour or two heating is normally, 22C or 23C is good. But after one or two hour driving I need to put air on 25C or 26C heat, because it was cold in the car. Warm air blows only on foot. I drove the car to a service center. They convince me that everything is all right. What man can do?

Thanks a lot

Heater is not working Inspection $94.99 - $114.99 Get a Quote

Hi and thanks for your question. It sounds like you have two different things that could be fixed. There is either a vacuum line that split open on the blend doors to the heater and a/c system, or the blend switch or blend motor has failed causing the blend door to stay in the floor position.

When you drive down the road, if the out side blend door seal to the A/C system is not sealing, then cool air will come into the cab making the air seem not at warm making the driver turn up the heat to compensate for the cold air. If you need assistance diagnosing your heater system, then seek out a professional, like one from YourMechanic, to inspect the car and guide you through repairs.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Brake lights staying on.
Brake lights staying on after the pedal is released is usually caused by the brake switch near the pedal being misadjusted or missing altogether. It could also be a short to power on the input side of the circuit. Have...
Car not accelerating
Hello, in your particular vehicle the RPMs and gas pedal are controlled electronically. The accelerator pedal position switch sends a signal to the ECU which sends a signal to the throttle position sensor. The throttle position sensor controls the opening...
Fuel gauge not working correctly
Hello, it sounds like the sending unit in the tank is bad. The only way to repair it is to replace the fuel pump assembly in the fuel tank. I would recommend having a technician come out and replace the...
Car shakes during acceleration and jerks to the right
If the engine shakes on acceleration even in neutral, then there is an imbalance in the rotating assembly of the engine. This could be caused by an engine peripheral such as an alternator or water pump or an issue with...
transmission pan continues to leak after replacing seal, took the pan off twice now will not seal?
There has to be some problem with the mating surface on the transmission or the pan and seal. If there are any pieces of the old seal on the pan, the chances the pan will leak at that spot are...
I fill my oil, then my car smokes when started after 10-15 min it goes away. But after like 2 days it needs oil.
Over a period of 20+ years, the internal engine components begin to fail. When it comes to blowing smoke and rapidly losing oil level, typically there are two culprits; the valve guides in the cylinder head, and piston rings inside...
Put a new lock cylinder in and key wont turn and is stuck
The key and lock cylinder is not the problem most likely unless the key is not cut correctly. The most common cause is the key lock rod mechanism between lock cylinder and the ignition switch or the ignition switch is...
Jeep starts fine but then won’t move. Only rev. Only happens when it sits overnight. I have a Jeep Wrangler, 112000 miles
Hi Meagan. Thanks for contacting us today. Usually when you can shift into reverse, but the car will not go forward in drive, then it's caused by a damaged shift solenoid or internal transmission problems. An obstruction of debris inside...
I need a part identified
The part in the picture looks like it is the PIP sensor also called cam sensor. The sensor is located in the top of the engine in front of intake manifold and is used to provide a cam signal to...

Related articles

How Much Does the AC Affect Fuel Mileage
Your car’s air conditioner is an important accessory – it helps keep you and your passengers comfortable and...
Why Does My AC Rattle When I Turn It On?
Common reasons why a car AC system makes a rattling noise is due to a failing AC compressor, worn serpentine belt, or worn out AC compressor clutch.
Symptoms of a Bad or Failing AC Control Module
Common signs include inconsistent cooling, out-of-date software, and uneven air distribution, since the module controls the whole AC system.