Hey all

Looking to get some information and hopefully a route to the conclusion.

Short story (seat Ibiza 1.2tsi cbzb) cars over heating and coolant begins to bubble.

This all started after a failed/leaky waterpump replacement and new v belt.

At first the top rad hose wasent getting warm and cabin heaters only blowing cold so I replaced thermostat and now top hose gets warm then hot and after a while bottom hose gets warm but not hot.

At this point I noticed the radiator fans were not coming on and coolant temperature was rising very high.

I removed radiator fan switch connector bridged between the 3 pins and high and low fans begin to work.

Vcds says the radiator outlet temperature is -47c

So I order a new fan switch and get that fitted only to find vcds still reads -47c and the fans still do not come on?

I’m now thinking the radiator is blocked and maybe hot coolant isn’t getting to the fan switch location? Would this be possible?

All fuses on fuse box are ok as are engine fuses.

Any other advise welcome