Mice in my heater fan

need to kill the mice or find a better place to park. even if you block this entrance they will not stop. I have seen whole electrical systems, vaccum sysyems. destroyed by mice. interior ect. get some poison and traps bated with chocolate. if you don't want to kill them find some traps and relocate them to a far away feild. if they are anywhere near your vehicle they will chew on anything and everything they can.

Check an see if radiator is full , if so check the heater hoses going through the fire wall an see if they are hot !

There could be a number of reasons. Fan is bad, fan area in box is so clogged it doesn't allow fan to spin, a bad switch at instrument panel, a bad resistor, bad connections. I would start by removing the fan. I believe you will have to go in behind the glove box. Remove the fan and check to see if it works, it may be fine if bad replace. Check inside of box for leaves and any other kind of clutter that may be preventing fan from spinning. Check wires to fan for mouse damage. Mice can take there toll on a cars wiring. If all is well so far check the switch in your dash. Switches are funny, some last a life time some don't. I believe you will find your problem, following these steps. GOOD LUCK FRIEND.

check the in take for the fan will be under the boot area under the window. check that the area is free from water and the vents are not blocked. there is a filter and if it has not been changed for awhile replace it. check the drain hole are not blocked. you may be feeding water in to the heater from this area and getting the temp sensors are getting wet.. failing that the electronic control unit for the heater is playing up..

Might be thermostat stuck open, but most common problem is where your heater hoses connect to the engine block, its common for this area to clog up with rust and corrosion.

I have had this when a gum nut or piece of leaf lands in the fan. I got luck and by removing the vents I could access the fan area. That may not happen in many cars but it is worth a shot.
On the Cortina TF I cut a hole in the air chamber in the engine area and got access to the fans and the resistor block.

2008 nissan versa mice nest in heater fan box. how do i remove heater fan blower?

Quite often you'll find resistor on firewall, of passenger side under hood. 1-1/2"x3" block attached to firewall. In area of where heater hoses enter.

It appears there is a resistor block there, either at blower connection area, or at firewall area on passenger side under cowl somewhere. It is quite common for blower to only work on high when resistor goes. Look for block, or base, 1-1/2" x 3" approx. with electrical connector to it.

the heater core is not under hood it is locatied behind glove box inside