Does anyone know the Nissan part number of the Heater Fluid Temperature Sensor? (Note this isn't the Coolant Temperature Sensor, which is Nissan part number 22630-3NA0A.)
I have a 2012 Leaf with the fluid based heating system - it's the one with the PTC Heater having one of these part numbers B7143-00Q0A, B7143-00Q0D, B7143-00Q0F, B7143-00Q0H, B7A43-00Q0K.
When I bought the car in the summer the weather was warm and I didn't test the heating. The heating blower and AC all seem to work fine, but it doesn't heat up. Symptoms are as per this post: https://www.mynissanleaf.com/viewtopic.php?t=23142
Hoping it might not be the PTC Heater... I've not got to that yet, but have so far measured the resistance of the Heater Fluid Temperature Sensor and it appears to be too low (it's 254 ohm at an ambient temperature of about 15 degC). With ref to page 14 of the HAC manual downloaded from here: https://ownersmanuals2.com/nissan/leaf-2012-repair-manual-heater-air-conditioning-control-system-section-hac-43047 a resistance of 254 ohm corresponds to a water temperature of 60 degC, which would mean the control system thinks the fluid is already hot. Does anyone know the maximum temperature the fluid can reach? The Resistance v Temp spec graph goes up to 80 degC, so perhaps that's the max? At 15 degC the spec graph shows the sensor resistance should be about 1.3 kohm so I'm suspecting (and hoping) it's just the sensor that's faulty.
I have a 2012 Leaf with the fluid based heating system - it's the one with the PTC Heater having one of these part numbers B7143-00Q0A, B7143-00Q0D, B7143-00Q0F, B7143-00Q0H, B7A43-00Q0K.
When I bought the car in the summer the weather was warm and I didn't test the heating. The heating blower and AC all seem to work fine, but it doesn't heat up. Symptoms are as per this post: https://www.mynissanleaf.com/viewtopic.php?t=23142
Hoping it might not be the PTC Heater... I've not got to that yet, but have so far measured the resistance of the Heater Fluid Temperature Sensor and it appears to be too low (it's 254 ohm at an ambient temperature of about 15 degC). With ref to page 14 of the HAC manual downloaded from here: https://ownersmanuals2.com/nissan/leaf-2012-repair-manual-heater-air-conditioning-control-system-section-hac-43047 a resistance of 254 ohm corresponds to a water temperature of 60 degC, which would mean the control system thinks the fluid is already hot. Does anyone know the maximum temperature the fluid can reach? The Resistance v Temp spec graph goes up to 80 degC, so perhaps that's the max? At 15 degC the spec graph shows the sensor resistance should be about 1.3 kohm so I'm suspecting (and hoping) it's just the sensor that's faulty.