My 2008 skoda octavia tdi keeps blowing fan resistors, why?

Door lock problems are a known issue

https://www.google.com/search?q=Skoda+Octavia+Elegance+1.9+TDI+MK1

and

https://www.google.com/search?q=Skoda+Octavia+Elegance+1.9+TDI+MK1.+wire+color+code

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Your talking about the interior blower? If the first 3 settings don't work, you have to replace the blower resistor. The relay is a different story. Though the relay could be built in the resistor. I'm thinking this is not your case. The resistor controls the speeds of the blower, until it gets to high. Then the relay kicks in to give the blower full power. I would say replace the resistor. I good thing to remember is, If you get any speed from the blower, the resistor is bad. If you get nothing,check the fuse, replace it, if it blows again, replace the blower. If the fuse doesn't blow, then start looking at the controller and wires. This advice goes for all makes and models.

this is the full set

Sounds like faulty coil. Check this on a diagnostic machine at a garage and you will get the answer.

haw i fix my rpm meter problem

dear . this knocking noise means fuel injectors ( One or two ) had stuck up nozzle in side ,so you need to replace injector nozzle ,
and re adjust injector pressure

open the drivers door there is a removable panel at the end of the dashboard with fuses behind it there should be a piece of card inside the panel cover telling you which fuses are which

how to change timming on skoda octavia elegance tdi 2001

Sounds like you have a bad blower motor resistor (manual HVAC). The resistor is just that a set of resistors in serious that drop voltage to regulate fan speed. Speed one uses all the resistors to drop the voltage the most. Speed for doesn't use the resistors so full power can be used by the blower motor to make it work at full speed.

The resistor is typically located near the blower motor under the passenger side of the dash. and will have 4-5 wires going to it.

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is the blower motor not blowing or the fan on the radiator not working? didn't say exactly which it was. If it's the blower motor and the fuse is good, it could be one of 4 things. Broken wire, bad fan speed switch, bad resistor switch (controls fan speed) or bad blower motor. Check for power to the fan speed switch, if it's good move to the resistor switch( this switch is normally located near the blower motor and is bolted to the air box to keep it cool) Pull it out and check it. It could be burnt up. If so, replace it but before doing so check to see if your blower motor works by hooking it straight up to a power source. Most of the time on older vehicles the resistor goes out due to excessive dust build-up and finally burns the coils out or it just dies of old age.