Carrier comfort pro serial number loctation

this came with my recent purchase and I'm setting about tonight to ID the issue with it. I'll get to that in a moment.

Where's the serial number located? It's dark here already and I don't feel like crawling around to find it.

Side question-Unit starts and runs but will not run for more than 10-15 seconds max. Control pad comes back with check engine run.

Narrowed it down to bad alternator, something win the oil pressure or maybe refrigerant pressure issue. Ideas? I'll come back with numbers on the alternator and an idea on the oil situation sooner than later. Unit says 11,250 hours on pad and I don't doubt it.

 

I took the shell off and immediately noticed the circuits the small alternator was attached to were filthy. Tried running it a few times; ### end of the alternator was squealing like a pig. Pulled the ####### and sprayed it with a whole can of of pb blaster in between heating it with a propane torch and turning the pulley. Cleaned the circuits with a brush and silicone then reinstalled it.

Put it all together and she's running great. Heating element inside needs work- not running well at all to be frank. But the small alternator is running free and fine now. Putting out14.2v.

Any tips for getting the electric interior heater up to snuff? I found the engine info in the interior of the shell btw, thanks for the tip though.

 

Where are the electric coils? Mine has an alternator behind the fan mount that is small, it also has a football sized alternator mounted on the bottom that I'm assuming is used to generate the electricity for the cab heat. Stator and circuits need cleaned on that.


It's 10pm here so I can't get fresh filters but did pull the air filter out and blow it clean, which will do for bringing it back to life for now. Hell it's running and that's a major achievement for the night.

 

Yeah my condenser is fubar. The whole unit is in bad shape.

 

Just as an update to anyone that might me remotely curious, I got the unit running.

Checked the alternator and it was just aboslute junk. Pull it off the block, torqued, torched and blasted the ### end bearing set on it with penetrating oil- got it turning freely enough to salvage it. Silicone on the bearing pack and reattached. Started running right after.

All new belts, filters and fluids. Heat ended up not working and a simple thermal fuse in the ccu ended up being the issue.

Outside of needing new dampers, a new condenser and some minor perephiral repairs I'm extremely impressed and curious as to why these aren't more popular. Easy to work on, third party parts and filters fit almost everywhere and after putting 40 more hours on it can say it's a great unit on initial impressions, even with nearly 12,000 hours.