Install the whole heater unit
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
In the passenger compartment:
Install the supports for the instrument panel
Tightening torque: 10 Nm.
Plug in the connectors and cables on the supports (with clips)
Tightening torque for ground connections 10 Nm
Install the control panel and adjust the cables, see Replace the Entire Control Panel
In the engine compartment:
Install new hose clamps.
Install and secure the hoses.
Install the mudflap at the top.
Cars with AC: Replace the hose on the support.
Check function and fill the cooling system, see Draining And Recycling Refrigerant .