The most common reasons a Volvo V50 heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. 0 % 31 % of the time it's the Heater Blower Motor 0 % 24 % of the time it's the Thermostat 0 % 18 % of the time it's the Heater Blower Motor Resistor 0 % 27 % of the time it's Why is my volvo heater not working? A volvo heater core is a small radiator (matrix) that transfers heat from the engine-cooling system to your car's air heating/ventilation system. The heater core is much smaller than the engine-cooling radiator in front of the engine. read on to learn more about how to replace a faulty heater core in a Volvo. The signs are relatively simple. In the event that your heating turns and does not create very little heat, the problem probably comes from the hoses. These clog up over time and no longer allow hot water to reach the heating of this Volvo V50. In this situation, clean the hoses or put new ones. Air pocket in the circuit of the Volvo V50 2005 Volvo V50 Heater Is Not Working? RepairPal will help you figure out whether it's your Heater Blower Motor, Thermostat, Heater Blower Motor Resistor, or something else. the problem is that when the heater kicks in the fan works as normal but the vents open and close in an oscillating fashion changing every five seconds or so, as the temp of the engine increases the speed of the vent oscillations slows down but continues. It's annoying. Anyone with a P1 should consider replacing the heater hoses before they fail. Same thing with the radiator hose above the transmission. The plastic T connect will crack/leak. The coolant bottle will crack open due to age, heat and pressure. Replace if original. There is not any coolant level sensor on any P1 Volvo. Parts pics are from ipdusa.com When I reconnected the controller to the four prong plug under the dash and check the output to the fan at the two prong connector I get a steady 12 V regardless of whether the fan switch is on or not, and even if the key isn't even in the ignition. If I then plug the fan back into the controller it doesn't spin and I get 0 V at the fan terminals. Check if there's fuel in fuel lines. Tank level sensor can be stuck so you might empty it dry and not even know it You have broken vent flap servos or just need calibration with Volvo diagnostic tool. If both heater hoses are hot, and the radiator is full of coolant, it may be a blend door problem under the dash. The MCC, manual climate control will have a fan speed switch with 4 speeds and the temperature control ***** go cool to hot. The ECC, electronic climate control will have a slider for infinite fan speeds and the temperature control ***** will have numbered temperature selection. Attached Thumbnails. After reaching normal operating temps, my 05 V50 T5 heat does not work unless it is on High. The airflow directions are all correct..just no heat. Local (long time) mechanic says "Scan Tested Detected Code: DTC CCM-0017 Damper Motor Faulty Position. Need Softward Update from Volvo Per TSB 87-48." UPqB3.

volvo v50 heater not working