john_harris

Radiator has been cleaned inside and out. CAC has been cleaned also. we will confirm if Diesel Exhaust filter has been cleaned or replaced but i feel they have looked at this too.

Bill, Yes this is a rear radiator coach. yes I tried manually downshifing to keep RPM at 1800 to 2000, as well as leaving it on automatic. and no, I do not use econo setting on trany. For first 16 years no problems with overheating unless radiator was choked off with dirt and debris but even then no derting until temp reached 228 to 230.

Have 2007 Holiday Rambler Endeavor with 400 HP Cummins ISL with 88,000 miles, original owner. Started experiencing overheating issues on return trip from Pacific Northwest while outside temps were 103 to 105. Started seeing engine temps running in 220 range on even moderated grades but only at 224 did check engine light come on till cresting grade however in the 205 to 208 degree range i started experiencing engine derating or loss of power on grades. As I had filled up with biodiesel for first time on Washington State, thought may have fuel filter issue so had them changed in Utah. Problem persisted but i limpen back to WV and immediately went to local Cummins Engine Service Center. Diagnostic codes only showing overheating issue but had cooling system checked out and flushed, new fuel filters again, fan checked out, water pump and t'stat replaced, and a sensor that is tied into engine derating replaced. Derating problem continues. engine preforms great on level grades and generally temps do not get extreme until heavy grades. On even moderate grades the stop engine light is coming on at anywhere from 197 to 210 and a significant loss of power starts to occur on moderate grades. on one extreme grade i did have engine temps exceed 224 and Check engine light came on as temps went to 228 before cresting hill. pull the hill only maintaining 25 miles per hour. again limped home home ant took it to Cummins. they seem to be at a loss. I question EGR but their diagnosis seems to point to no issue. Anyone else experience similar issues or have thoughts to point me in a direction.

Thanks, Bill. Yes downshift helped to a degree until derating kicks in. thanks for links. I have reached out on them

2007 Holiday Rambler Endeavor pusher. Had issues returning from cross country trip with overheating and loss of power. runs fine on level but under load on long grades looses power at 208 degrees. Original diagnosis pointed to clogged radiator and clogged fuel filters after running biodiesel from west coast. Rad cleaned and both fuel filters changed. fuel delivery not issue. All now pointing to bad fan clutch. Local Cummins shop says the can not find replacement as this in not a Cummins part but one supplied from OEM (Monaco) Anyone had similar issues or difficulty in tracking down fan clutch. or potential source for same.

by the way, magnum monitor also switched out with inverter.

Richard, no, this was the reason i swapped out inverter. this first occurred while on a trip to Virginia 3 weeks ago where we had limited run times for generator. problem occurred after being away from coach for most of the day. when we returned, batteries showing 11.9, fired up generator and after only a few minutes, went from bulk charge to absorb. generator ran for an hour or so while we did dinner, then as soon as the generator was turned off, power went down. Magnum monitor said low batteries, but charge controller on solar indicated 12.8 v with solar panels off. did not have multimeter to confirm at time but basically got the same type readings when i got home. Batteries charged for days on shore power but as soon as shore power disconnected, power went down When swapping out inverter, batteries were off shore power only for an hour so should have been pretty good shape to begin with. took pictures of all original connections and reconnected identically.

Herman, ATS is my guess now, any way to check it out or test theory. Richard, no new loads other than residential refrigerator installed 2 years ago. Water heater off.

interior electrical system shuts down as soon as i disconnect from shore power. First thought it was the 15 year old 2000w Magnum ME modified sine wave inverter. batteries tested 12.6 volts but magnum panel showed low voltage fault. could not retract jacks or return slides without having engine on. even had trouble starting generator but thru boost got it fired up and made it home. had to run generator while driving to power residential refrigerator. when got home and plugged into shore power, all was again normal until after a few days of fully charging to float charge. again as soon as i disconnected from shore power, all power shut down. came back on as soon as reconnected. Replaced inverter with new MS 2012 and everything worked fine on start up. after an hour or so charging batteries to float, turned of shore power and power immediately shut down again, both 12v and 110v. panel indicated low batteries at 4.5 volts. I checked batteries with multimeter and each tested at 6 volts individually and 12.5 in parallel but magnum panel still indicated low voltage and no power even after connecting to shore power. went back thru start up procedures, did reset on inverter but nothing changed. shutdown shore power and tried to start generator. even with boost took a while and would not stay on. plenty of fuel. started engine and after a few minutes, power came back on and seemed to be normal and batteries at 13.8v until shutting of engine. then no power. reconnected to shore power, no change. restarted engine and power came back on as before. this time i reconnected to shore power before shutting of engine. this time power stayed on. left system plugged into shore power but confident power will go down as soon as i drop shore power. 12 years ago i bypassed the salesmen switch, so no issue there. last year i added 400 watts of solar but added a cut off switch to isolate solar panels into charge controller and controller to batteries to avoid potential conflict with charging batteries from solar while on shore power or using generator. not sure that caused issues with ATS. any thoughts of trouble shooting power issues. 2007 HR Endeavor

Getting ready to install 400 watt Renogy solar panels with 40 amp MPPT controller to our 2007 Endeavor. RV is equipped with factory 8kw Onan Generator with 2000 watt Magnum inverter. Do not plan to change any of that. I have reviewed several wiring diagrams and YouTube videos of proper set up but none address how to deal with potential isolation of solar system from batteries while on shore power or while using generator. Do I need to add a cut off switch to the lead from the solar to the batteries to isolate solar system when on shore power or when running gen set. Renogy has not been too helpful with set up of this nature. Plan is to use solar for battery charging when dry camping in National parks or when restrictions to gen set run times are in place. I am sure someone has dealt with this before.

Should have followed up. Replaced batteries in October with Crown 260 amp hr batteries. All is well. no inverter issues.

Thanks for responses. Yes, I know batteries were on borrowed time but had one more trip scheduled before putting coach to bed for winter and was planning to replace next spring. Crown 260's are on order. Generator is 8 kw and has held up running both AC's and MW at same time in the past. New refrig is Samsung and says 5 amp draw max. I was only running ac's when on shore power anyway, so not sure that was an issue. Will see what happens when new batteries arrive.

Magnum inverter/charger in our 2007 HR recently started shutting down giving us "internal fault 1" code while on generator. I powered down, did a hard reset and all seemed fine for while but next day and again day after, had similar issues but reset cleared code and all was fine. Batteries (flooded Crown 235 amp hrs) are approaching 8 years but holding charge overnight even running a recently installed residential refrigerator. Got home and everything seemed to be fine while on shore power for next few weeks. Hit road again and has similar issues while on generator but figured once I got to full hook up, 50 amp service, everything would be OK. Not the case, now fault occurs withing 5 mins of powering up either on generator or shore power. Reset clears fault but not nor long. Powered everything down now. I did observe that one of the batteries appears a bit swollen but water level was fine. Curiously, the AC unit continues to run even after the inverter cuts out. Apparently the AC units are bypassed and directly feed by shore or generator? unfortunately Refrigerator is not but I am guessing that is because of my choice of which plug I used when powering frig when i switched from the old gas/elect. Could not find fault codes for Magnum. So, does it sound like inverter is the issues or perhaps is a dead or shorted battery is causing the fault?