Join Date: Sep 2005
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Resistor packs, 100% certain.
Two types of fans in Lagunas one (the expensive one) has the packs integral to the heater, the other most common fan has them as a plug in module on the fan.
Suggest you get under the dash and find out.
When I was at the scrappies looking for a fan, every one I found was the common one so a replacement resistor pack should be easy.
Currently in Jules's garage:
2005 Laguna Initiale 2.2 DCI Hatchback