Espace heater/blower unit problem

This appears to be located beneath the bonnet,behind some insulation, there is no picture of it in the haynes manual & i need to be sure I am looking at the right thing before I replace it.
The heaters only work on two speeds out of five & blows cold air only.

Can any one help me identify this???
Thanks

Sounds like you have two problems
1 The blower resistor pack is blowen causing a loss of speeds (usually the lower speeds)
2 Either the internal flaps are out of sync or the heater matrix could be blocked