Bongo Fury

mazda bongo v6 radiator fans not working after replacing temp sender switch
any suggestions welcome
fans where working before switch was replaced
how can i check the fan temp switch

normaly they come on when the air con is ,well on most cars that is .quik and easy check.

The fans recieve two seperate feeds, one from the coolant side and one from the air con side, so it isn't a conclusive test switching the aircon on. I had the same red herring when trying to diagnose a problem on my aircon, the fans worked on the coolant side but not on the aircon side. Turned out to be the fans.
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Bridge the two wires on the radiator fan switch with the ignition on and the fans should kick in, if not, with the fan switch still bridged check for a feed at the fans (making sure your aircon is switched off). If there is a feed at the fans then it is your fans that are at fault.
Also check the fuses under the bonnet marked fan1 fan2.

Put the old switch back on ?

It was all working before you replaced it after all
Maybe it's not that simple,,,,,,,,, but it might be


Best of luck

the fans work when the switch is bridge , but there is no heat coming into the cab , could it just be a airlock in the heater system causing the fans to not work , if i lift the wiring of the fan thermo switch slightly the fans work ,but if i push it down all the way the fans stop working

It sounds like you have an air lock in the heater matrix but also a possible break in the wires to the fan switch. Japanese wiring notoriously thin . Follow the instructions on here for bleeding the cooling system, but locate and repair that break in the wiring first.
Good luck

bigmal wrote:the fans work when the switch is bridge , but there is no heat coming into the cab , could it just be a airlock in the heater system causing the fans to not work , if i lift the wiring of the fan thermo switch slightly the fans work ,but if i push it down all the way the fans stop working

Are we talking about rad fans, heater fan or scavenge fan that you are trying to get working?

its the rad fans which are not working ,many thanks for all the suggestions will try them today
and report back

If you suspect you have an airlock, then you need to bleed the system asap. when you say there's no heat coming into the cab, is the heater/ac fan itself blowing ok?

have refitted old temp switch fans now working , are the temp switch on a diesel bongo set at a diffrent temp to the petrol v6 bongos or are they all the same settings ,does anyone know

I'd think they're different, pretty sure they run at different temps, I'm sure some of the v6 guys'll be along soon.