heaters air/con problem

[aswann0161]

Hello everyone I have recently bought a 51 plate 406 110 hdi it was cheap and has lots n lots of issues I have sorted many of them but the one im trying to sort now is my heaters/air con the control panel lights up and all buttons work but the fan doesn't come on and its leaking hot air into the car I have checked all plugs and wires I can find but cant find any breaks so im asking all you lovely people for help many thanks