Topic: Weird thing happened with my e-fan.

[Jeffy]

I traded emails with him the first time it happened back in April.

He was questioning the wiring of my in cab switch, but that would have nothing to do with the fan staying on even with the ignition turned off.

I'll give him a week.

Were you able to tell if it was the High-speed or the low-speed relay?  It was the relays sicking.  There's really no other reason.  Especially if you hit it and it fixed it.  The guy's an idiot if you told him everything and he's still suspecting your wiring.  Replace the relay if you suspect it.  Relay's are relatively cheap and do go bad.

[Mozman68]

It's the low speed one....how can I replace a heat sunk relay?

[Jeffy]

It's the low speed one....how can I replace a heat sunk relay?

Have a picture of it?  Really, there's no reason for there being a heatsink on the relay, especially if it's the low-speed relay.  It's not pulling enough amps to really be an issue.  Just have to install a relay that's not underrated.

[sharpxmen]

huh? i did not think those relays had a heatsink, i don't see any reason for one anyway like Jeffy says. take a pic so we can see how they look like, on DCC website they don't seem to have a heatsink.

[grumpygy]

Not sure if you can see in this photo.  but nothing looks replaceable.

[Mozman68]

I had "heat sink" on the brain...should have said "sealed".

He assembles the controller with the relays and then seals the whole assembly to protect it.

I'm sure I won't get a response thanks to the 90 day warranty.

[sharpxmen]

He assembles the controller with the relays and then seals the whole assembly to protect it.

that's retarded.

[Mozman68]

Really?

That's kind of what I was paying for. I guess you've never had relays fail due to corrosion from being exposed or fail due to bad connections.

It's a very nice module.

[sharpxmen]

Really?

That's kind of what I was paying for. I guess you've never had relays fail due to corrosion from being exposed or fail due to bad connections.

It's a very nice module.

i meant it's retarded to glue it so you can't replace it and you have to buy the whole thing over again (not to mention the wait time) for a $10 or so relay.

there are relay weatherpack connectors that seal the relay on the outside of the plastic cover, you don't have to cover it in resin to prevent water going in, there are other solutions

[grumpygy]

Also would not that cause it to overheat.  As to corrosion and such what about all those relays already on jeep and other vehicles they are replaceable and some have been on my jeep since it was new in 94.  The ones that have been replaced I'm glad they can be done individually.

[sharpxmen]

Also would not that cause it to overheat.

nope, relays overheat if they are undersized of if the contacts go bad.

[Jeffy]

I agree it's a dumb design.  Relays do go bad and if you use resin, you have a mess to deal with trying to get them out.  A real PITA.  Relays, especially high-amp relays are pretty robust and can withstand some water and more importantly vibrations.  Although high-amp relays usually have screws on the terminals and not just blades.

Also a bit silly to use solder-less connectors.  Should be using a plug connector.

I really like my setup though.  Simple and easy to setup and bypass/fix if needed.  Although if I was going to do anything differently I'd change the 40A relay with a 75A relay but I haven't had any problem once I up'ed the wiring and replaced the ATC fuse with a circuit breaker.

[jfrabat]

I also used a bypass on mine to override the controller and turn the fan on.  It's helped already..