Lots of possibilities. If the fan runs, it could be blockage in the heater hoses or heater core, a faulty thermostat, insufficient amount of coolant... if it's the fan, could be a bad fan motor, bad switch, interruption in the power supply, bad fuse or relay..
You have to do some actual diagnosis in order to narrow it down.
The 2003 Nissan Murano has 24 valves.
The 2003 Nissan Murano has a V6 engine.
No, mp3 files are not supported in Murano I (2003-2008) No, mp3 files are not supported in Murano I (2003-2008)
The 2003 Nissan Murano is a gas-powered vehicle.
The 2003 Nissan Murano is 15 ft. 7.6 in. (187.6 in.) long.
The 2003 Nissan Murano has double overhead cam (DOHC).
The curb weight of the 2003 Nissan Murano is 3801 lbs..
The 2003 Nissan Murano has a 28.0 degrees angle of approach.
The 2003 Nissan Murano has a 26.1 degrees angle of departure.
The 2003 Nissan Murano has a continuously variable-speed automatic.
The 2003 Nissan Murano's turning circle is 37.4 ft..
The height of the 2003 Nissan Murano is 5 ft. 6.5 in. (66.5 in.).