Onan 7.5 Diesel Gen Set Fault Code 24

Rich Biebel · 04-10-2022, 04:58 PM

No there is no adjustments on the battery charging output
Not even sure you have that as on those machines I believe it was optional
Most MH's have battery charging converters/chargers so a battery charging output is not needed
Anytime I have someone with this issue I advise them to hook up an external charger. Far easier and cheaper

Access to any machine for repairs is often a big problem and I always evaluate the job before doing the job.
Removal is sometimes the only way to do a repair.
Some installs were done as if there would never be any need to work on the machine.....a big mistake......

I change those temp sensors anytime I'm inside a 7.5 Onan.
I've seen them with a lot of deposits in the pocket below the sensor.
I think it was from Dex-Cool type antifreeze.....Don't use it !
I use green A/F......

Larry Hill · 04-11-2022, 07:51 AM

Thanks Rich. You hit the nail on the head, lots of deposits around the sensor. A battery charger it will be with green antifreeze.

04-10-2022, 04:58 PM	#1
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,314 Likes: 25 Liked 544 Times in 213 Posts	Re: Onan 7.5 Diesel Gen Set Fault Code 24 No there is no adjustments on the battery charging output Not even sure you have that as on those machines I believe it was optional Most MH's have battery charging converters/chargers so a battery charging output is not needed Anytime I have someone with this issue I advise them to hook up an external charger. Far easier and cheaper Access to any machine for repairs is often a big problem and I always evaluate the job before doing the job. Removal is sometimes the only way to do a repair. Some installs were done as if there would never be any need to work on the machine.....a big mistake...... I change those temp sensors anytime I'm inside a 7.5 Onan. I've seen them with a lot of deposits in the pocket below the sensor. I think it was from Dex-Cool type antifreeze.....Don't use it ! I use green A/F...... __________________ Rich Biebel S/C 1479 Stock 147R

04-11-2022, 07:51 AM	#2
Larry Hill Live Reporter Join Date: Oct 2004 Location: Hickory, Ky Posts: 10,642 Likes: 1,940 Liked 10,721 Times in 2,232 Posts	Re: Onan 7.5 Diesel Gen Set Fault Code 24 Thanks Rich. You hit the nail on the head, lots of deposits around the sensor. A battery charger it will be with green antifreeze. __________________ IHM Used Parts https://ihmusedparts.com 888-821-1817