Under the glove box, look up under from the floor and you will see it bolted to the junction box, disconnect the battery then the wires to the fan, pull three bolts and out she comes
First you have to determine what the problem is. The fan, fuse, switch, loose connection. Check the fuse first and then run power to the fan to see if it works.
The 2007 Toyota Camry heater fan fuse can be found in the fuse box. The heater fan fuse will be at the bottom of the first column.
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If a heater fan is not working on a Toyota RAV4, the problem might be with the blower motor resistor. The blower motor resistor is either on the firewall next to the heater motor or in the dash on the passenger side above the heater core.
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If the heater fan is not blowing on a 2001 Chevy S10 Pickup, it is possible that the fuse needs replacing. It is also possible that debris is interfering with the operation of the fan. Could also be, a faulty fan motor, a faulty fan motor speed resistor, a faulty fan motor switch,
Because it's broken...
Remove the wiring harness to the heater blower fan. Remove the retaining bolts. Remove the fan from the blower. Reverse the process to install the new heater blower fan.
oil barring on 1998 Toyota Avalon blower motor?
On the back of the engine block.
To find that out you need to take it to a Toyota Dealer for a service.
Fan (heater/air conditioning) relay switch