my heater in my renault laguna blows cold air i was told to reverse flush it how do i go about doing this? thank you my car is a 2.2 diesel year 1996

Frank Burton, December 2004

just swap the pipes over in the engine compartment where they attach at the bulkhead and go through to the cabin, water goes in through one, through the matrix then back out through the other one, so when you swap them over the water goes through the other way ect.
or you could disconnect the pipes and put a hose pipe on one of the matrix pipes then keep swapping the hose pipe over which will flush water through bothways

ste, February 2005