The blend door actuator may require recalibration after replacement. Due to the complexity of the replacement job, it is not recommended as a DIY project. Replace the faulty partĪ bad blend door actuator usually cannot be repaired and must be replaced with a new one. One side hot, other side coldĪ common symptom of a faulty blend door actuator in vehicles with dual zone climate control system is one side blowing hot air while the other side is blowing cold air. Symptom: creaking sound A bad blend door actuator making a strange creaking sound when adjusting the climate control temperature. A bad blend door actuator making a knocking sound when AC turns on. The sound is something like a light tapping on the door and it typically happens when you turn on/off the air conditioning system or start the engine. If the blend door actuator fails to fully open the blend door towards the heater core, it will result in poor heating performance.Ī knocking noise from behind the dashboard could be an indicator of a bad blend door actuator in your S60. Faulty blend door actuatorīlend door actuator plays a role in controlling the temperature inside your S60. Therefore it is important to diagnose a failing water pump at early stages to avoid expensive repairs later on. A bad water pump will not only cause poor heating, but can also result in engine damage due to overheating. Water pumps usually last for more than 100,000 miles, but they can fail at any time. If the water pump has worn out and the coolant is not being circulated as effectively as it used to, it can cause the heater to stop working properly because there’s less coolant available to transfer heat between the engine and the heater core. The water pump is the heart of the cooling system in S60 responsible for pumping coolant throughout the system and cooling the engine. Your vehicle may also consume more fuel than normal. But if the weather is too cold, the engine may never reach its optimal operating temperature with a stuck open thermostat. Since the heating system in S60 relies on the hot coolant from the engine to heat the interior, the heater will blow cold air until the engine reaches its normal operating temperature. But if the thermostat has developed a defect and is stuck to open position, the coolant will continuously flow through the radiator and the engine may take a long time to reach its optimal operating temperature. When you start your S60 when the engine is cold, the thermostat cuts off flow of coolant through the radiator in order to quickly reach the optimal engine operating temperature. Thermostat is a part of the cooling system in Volvo S60 which ensures that the engine reaches its optimal operating temperature as quickly as possible and maintain it under all operating conditions. There are flush kits available in the market that can help you do the job yourself. Flushing is done by pushing water through the outlet hose of the heater core and draining the gunk from the inlet hose. Recommended videoīefore you consider replacing the heater core in your S60, it is recommended to flush the existing heater core. If the coolant level is low, open the cap and pour some coolant into the tank until it is between minimum and maximum mark. You just have to locate the coolant overflow reservoir and inspect the level of coolant in it. Check coolant levelĬhecking coolant level in S60 is a fairly some job. The sound is most prominent right after you start the vehicle. Low coolant level or air in the heater core can sometimes cause sloshing sound from behind the dashboard when the engine is running. By filling and properly bleeding the system the heat should come back. Since the heater core is usually slightly higher, the air will accumulate in there first. If there is air trapped inside the heater core, the coolant will not be able to flow through it properly. When you turn on the heating, air gets blown through the heater core, warming the air in the cabin. The hot coolant is pumped through the heater core located behind the dashboard. The heating system in S60 uses hot coolant or antifreeze from the engine block to heat the interior of the vehicle. If the cooling system is not full and bled properly, the water pump will not be able to push the coolant around the system efficiently. Low coolant level or air in the cooling system can cause the heater to stop working properly in S60.
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