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Heater Blower Resistor
A bad control switch can cause your 2003 Nissan Sentra heater blower to stay on. The motor or a bad sensor can also cause the heather not to work properly.
Your heater switch may not need to be replaced. The heater high position is controlled by a fuse under the hood. Until you find the fuse and replace it, your new switch will not work. JRR.
the thermostat used to control the heater and after we select the four pole switch to some number the thermostat start connect the power to the heater at the same time the heater start to heat and when we select the switch to zero position the heater not work
The Nissan Sentra should not have any other heater installed due to fire hazards. The stock one is very good.
because it's broke
it's more than likely the switch for the heater.
It is probably the dimmer switch. The contacts in the switch will get pushed back and when you switch to dims they will not touch. Had the same problem on my 91 Nissan.
did your heater switch go out all of a sudden or did some work like high work and low not work? if some worked your blower resister is most likely bad under your glove box
The brake switch for a Nissan Quest should be under the dash on the brake pedal arm. If the switch goes bad then the brake lights could stay on or not work at all.
check the fan switch.
2001 dodge ram 1500 ac and heater flow regulator switch does not work. works only on defrost. How to fix?