T444E fan clutch

[cadillackid]

I took my radiator completely out... , I wouldnt "poke at it".. but a power washer thats not turned up so high as to bend the fins but high enough to push things out is good... but that only cleans the outdoor fins.. I had my radiator steamed so the inside was free of corrosion and build up..



as for the dash switch, correct +12 to the A/C terminal. the idea is that on A/C vehicles you want your fan on anytime the compressor runs.. with a school bus, the A/C condensers are separate so you can use that input on the controller for a manual switch..



I just got that new version of PAC to put on mine so I can change the fan temp with bluetooth.... the old version was a PITA to set up.. havent installed mine yet.. im still on the 2750 without BT.. that controller needs mounted in the cab, dont mount it under the hood or outside.. you can put it under the dash or inside your switch panel area without harm..



I wired my clutch to the fan Low terminal and programmed only for low (single "speed") since its a clutch and not a dual relay electric fan..

 

[Omnibot2000]

Just for reference.

My 2000 T444e has electric fan controlled by the ECM. Looks factory to me.

 

[cadillackid]

Just for reference.

My 2000 T444e has electric fan controlled by the ECM. Looks factory to me.

they were offered that way... the ECM is set to turn the fan on at a pretty high temperature.. with the right servicemaxx (or orion) it can be changed..

 

[daytripper2]

I took my radiator completely out... , I wouldnt "poke at it".. but a power washer thats not turned up so high as to bend the fins but high enough to push things out is good... but that only cleans the outdoor fins.. I had my radiator steamed so the inside was free of corrosion and build up..



as for the dash switch, correct +12 to the A/C terminal. the idea is that on A/C vehicles you want your fan on anytime the compressor runs.. with a school bus, the A/C condensers are separate so you can use that input on the controller for a manual switch..



I just got that new version of PAC to put on mine so I can change the fan temp with bluetooth.... the old version was a PITA to set up.. havent installed mine yet.. im still on the 2750 without BT.. that controller needs mounted in the cab, dont mount it under the hood or outside.. you can put it under the dash or inside your switch panel area without harm..



I wired my clutch to the fan Low terminal and programmed only for low (single "speed") since its a clutch and not a dual relay electric fan..

Digging this thread back up as were gearing up for a long honeymoon trip...
Having the digital controller has been great as were able to turn on our fan on demand. But this is something that happens very often:
The dashboard gauge signals that were overheating (starts beeping at us cause the gauge goes past the temp treshold) even when the dakota only reads much lower maybe around 210. This happens almost everytime we come up to operating temp. Then we turn on the fan clutch and it cools down. Only to happen again once it gets hot.
Im thinking maybe the bus temp sensor and the aftermarket sensor connected to dakota are reading different temps and maybe we have to apply an offset to control when the clutch comes on to be much earlier?
Not sure which sensor to trust as the "correct" engine temp.
Our aftermarket sensor is right next to the thermostat housing. Where is the gauge temp sensor? Where is the pcm temp sensor? And which one controls when the bus starts beeping at us and does it truly mean we are overheating at that point?

We have noticed coolant has been shooting out of the reservoir cap when this happens. So it seems like we are getting too hot and maybe the aftermarket sensor taking temp at the thermostat is reading colder than it should?

Any thoughts on the matter? Do you have an offset in temp to tell controller when to engage?
All help is appreciated

 

[ewo1]

We have noticed coolant has been shooting out of the reservoir cap when this happens. So it seems like we are getting too hot and maybe the aftermarket sensor taking temp at the thermostat is reading colder than it should?

Any thoughts on the matter? Do you have an offset in temp to tell controller when to engage?
All help is appreciated

forget about what the guages say, coolant shooting out of the resevoir cap deserves a much more thorough inspection of your system.

When was the las time you replaced your thermostat???
Flush the inside of the radiator/block?
I would also highly suggest using some coil cleaner and cleaning the radiator fins, external clean.

what engine you got?

 

[daytripper2]

forget about what the guages say, coolant shooting out of the resevoir cap deserves a much more thorough inspection of your system.

When was the las time you replaced your thermostat???
Flush the inside of the radiator/block?
I would also highly suggest using some coil cleaner and cleaning the radiator fins, external clean.

what engine you got?

T444e
Radiator is 1 year old not dirty at all.
So is the thermostat but were getting a new one in anyways because of the coolant issue

 

[Omnibot2000]

Pressure test the rad cap to see if it has failed.

Get temp gun and check surface temp of T-stat housing to see how hot it truly is getting.

Possible you stuck a hotter thermostat in it? Been a while since checking out what's available.

I ran a colder one then factory installed.

 

[BamaBus]

Is it possible to install this thermostat upside down?

 

[Omnibot2000]

Is it possible to install this thermostat upside down?

With the OEM T stat. No, not possible. I would like to think an aftermarket would not fit either.