Hi everyone, I recently had problem my bursted radiator and changed new radiator, thermostat(oem), lower radiator hose and radiator fan switch sensor (aftermarket from eBay). The problem is the cooling fan and condenser fan are not kicking when the temperature gauge pass half way through. I swapped around the relay under hood in fuse box but doesn't do any good to cooling fan to run. Both fans run only when A/C on. I am running out of ideas.
Fan are working, New thermostat, new fan switch, relay seem all good. Is there anything missing I need to do running the cooling fan? Please help. I have searched on the forum and didn't see anyone had similar problem. Has anyone used aftermarket radiator sensor fan switch with any issue?
TL has another sensor on thermostat housing. Not sure about if 2005 TSX has another sensor. What I need is somehow to trigger the fans to run. Please any of your thoughts. Thank you everyone in advance.

 

OK. Here's what happened. As above I have do everything made it's possible to work so I tried to figure out what and thought maybe the new sensor fan switch might cause not working so I jumped the wire that go to the switch and the fan start running. Now, I have to get the OEM switch. Just unlucky that the one I bought is defected. But for some reason newly installed ignition coil and spark plug caused misfire engine at cylinder #3 and #4 after jumping the fan switch wire. I don't know because of that or my new ignition coils are aftermarket. Hope after replace switch again and replace ignition coil again, should be good. Thanks.

 

When I was researching tsx coil packs, some people stated that some aftermarket coil packs had a loose fitting bottom end which caused issues or completely failed after x amount of days. It's better in the long run to pay more for oem or ngk quality/reliability, rather than a lesser brand at a lower price.

I ended up getting beck arnley coil packs for a reasonable price online. They are reboxed oem coil packs.

 

I found out the problem is not the coil pack but I think engine gasket blown and coolant leaking into ignition area cause misfires. Now, I can't start the engine at all. Engine turn but doesn't crank and stop as soon as release key. I am going to get radiator pressure test kit find out where the leak.
After changing oem cooling fan switch, fan run but not long enough to drop temperature and temperature kept raising. Probably relays are bad. Tried switch around the three relay in fuses box under hood. This is going to be very costly my time and money. Thanks for reply.