Austinbk1

I’ve got a 2005 Chevy Silverado 5.3 and the electric fans are not working like there supposed to, it started overheating every now and again and the other day it got up to 240 when I was pulling a trailer, nothing to heavy it was just a four wheeler but definitely shouldn’t be getting up to 240 every other time it just went to 220 give or take and it would come back down. The fans come on low speed when the A/C is turned on but without the A/C on the fans don’t come on until it’s already technically “overheating” I had my scanner hooked up the other day and was testing everything so here’s what I found. I can turn on all 3 relays and the fans work when I do which tells me all of the circuits are fine. When I let the truck sit and idle and get to a temp higher than it’s supposed to be I can turn the fans on and it immediately cools back down to regular temp which tells me the fans are definitely the issue. If I let it idle without messing with the fans and having the A/C off the fans done kick on until 220-240 give or take and it’s honestly not very consistent. I replaced the temp sensor just because it was a cheap fix but didn’t change anything. I’m not sure what the best next step is to take or where I should go to next looking for ideas.