8.3 ISC Cummins Grid heater Relay

[Bill Hines]

Ok I have found the Air Temp Sensor with a little help from everyone.

Here is the info: jacwjames photo was it.

proof: 

pwhittle was great help, trace down 2 issues at the gathering. 
1. aux battery boost ( now fixed)                                
2. tracing down the wire to grid relay #31 and 41 for grid heaters 

I hope by replacing the old one that will fix the problem. 

 

 

 

Edited March 7, 2022 by Bill Hines

[Bill Hines]

Here is another photo after spraying electrical contact cleaner. 

[Bill Hines]

IT’S FIXED! Wow very excited,  It’s now working

This is what id did:

1. removed  sensor with a deep socket 13/16.

2. Cleaned sensor with contact cleaner 

3. hooked sensor to plug in connector

4. sprayed sensor with Electronic compressed gas (held can upside down) ice cold and had wife turn key to first position and click power to grids. 
Thanks to everyone 

Bill 

[frank@fpexton.com]

Excellent! Did you get the sensor out from the rear or did you go through the hole in bedroom? 

[jacwjames]

Glad you got it fixed.

Was the end of the sensor that dirty???  If so I'd be checking your air intake system. 

[Bill Hines]

More info: I did go through the hatch under bed. I have no bedroom slide so good access. 
jacwjames yes 22 years of use. Previous owner did not take good care of MH. We’ve put 38000 miles since 2013 when we purchased the RV.

Some more photos. 

[peter howe]

OK I have same issue, was 52 deg this morning and grid heaters didn't turn on???

[peter howe]

On 2/27/2022 at 6:14 AM, Bill Hines said:

On my 2000 Dynasty 34 York Mh when starting, the grid heater solenoids are not engaged before starting. Wire #41 and #31 are not powering the relay. Trying to chase down where the wires go. Hopefully they could be disconnected or dirty and simple fix. I have a part#3408346 for Temp sensor for grid heaters.  The photo shows wire #41 and #31 attached to grid heater relays. They exit through top of compartment. The engine starts easy because I live in Florida, but in cool or cold weather it’s not happy for about 60 seconds and I generally turn on block heater hours before starting to over come grid heaters not functioning. Any help is greatly appreciated. 

Thanks

Bill

I am having same issue no grid heaters and on cold starts it smokes and stumbles