heater blower resistor in 96 honda civic.

i found a diy guide on using resistors from maplins to replace the burnt out resistors for the blower. the guide says to use 3x1 ohm ceramic wirewound resistors with a 10w rating . now ive tried this and it works but the blower is too strong.

if i were to use 3x 2.2 ohm resistors with a 10w rating instead would it be safe? or would i need resistors with a higher power rating?

I assume these are in series and the supply is 12V?

The 3 x 1R circuit would dissipate 16W per resistor so it was somewhat above the resistor's rating.

With 3 x 2.2R resistors they will dissipate 7.3W each so that will be OK.

cheers mate, il give it a go tommorow

Spectre said:

I assume these are in series and the supply is 12V?

The 3 x 1R circuit would dissipate 16W per resistor so it was somewhat above the resistor's rating.

With 3 x 2.2R resistors they will dissipate 7.3W each so that will be OK.

Click to expand...

so am i right in thinking it would be safer to use the 2.2 ohm resistors rather than the 1 ohm resistors im currently using?

Viper said:

so am i right in thinking it would be safer to use the 2.2 ohm resistors rather than the 1 ohm resistors im currently using?

Click to expand...

Yes, they should be working within their rating.

You could use higher rated ones if you want. The rated power is what they can handle, not what they actually dissipate all of the time.