Engine heat loop from AquaHot
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01-02-2017, 14:28
Post: #1
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Engine heat loop from AquaHot
Hi Group,
I have 97XL Royale and seem that I can't pre heat engine block from the exchanger switch on the dash. It lights up when pressed, but after hours being on the block still isn't warm at all. I have no idea if a pump is used to move coolant thru block, where the pump is located, or if there is a fuse or breaker somewhere. It has worked up till 3 weeks ago. Thanks for your help Jonathan Fine 1997 Royale XL # 201 |
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01-02-2017, 18:16
Post: #2
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RE: Engine heat loop from AquaHot
(01-02-2017 14:28)Jusfine Wrote: Hi Group,Do you have a Wabasto or AquaHot? Is it running ok but not producing hot water/coolant going to the engine? The circulation pump should be internal to the unit. Did someone turn off the valve on the block heater hose loop near the engine? Chuck & Tela Millsap Arizona 2003 Marathon XLII S/S 2000 Wanderlodge LXi S/S 2004 Wanderlodge M380 D/S 2000 Wanderlodge LXi N/S |
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01-02-2017, 19:55
Post: #3
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RE: Engine heat loop from AquaHot
Hi Chuck
Thanks for your response. I found the pump for the engine loop. Checked the fuse, the pump was humming, seem that there is something sticking in the DD thermostat. After a few taps on the housing I have coolant flow. I will turn it on tmro morn and see if it is still able to warm the block...but a thermostat is in my future. Chuck you still have all those BB's??? Thank you. Jonathan Fine Aztec, NM soon to be in Quartzsite. |
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01-02-2017, 20:29
(This post was last modified: 01-02-2017 20:30 by davidbrady.)
Post: #4
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RE: Engine heat loop from AquaHot
Hi Jonathon,
Below I attached the AHE-100-02S Service manual. Page 27 has troubleshooting steps for the engine loop heating function. As you've already discovered fuse 'A' is the fuse for the engine loop pump. The manual goes on to explain the procedure to replace the pump brushes, they often go bad. I don't think the DD Series-60 thermostats come into play. When the DD t-stats are closed the DD water pump circulates coolant thru the head which is where the AH taps in, so there is a fluid path even with the t-stats closed. But, my New Year resolution is to kick my caffeine habit so bear with what may be my fuzzy logic! LOL! david brady, '02 Wanderlodge LXi 'Smokey' (Sold), '04 Prevost H3 Vantare 'SpongeBob' "there is no perfect forum there are only perfect forums" |
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01-03-2017, 14:14
Post: #5
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RE: Engine heat loop from AquaHot
Jonathon,
FYI. In the S-60, there are two thermostats sitting side by side in the thermostat housing to provide redundancy. Chuck & Tela Millsap Arizona 2003 Marathon XLII S/S 2000 Wanderlodge LXi S/S 2004 Wanderlodge M380 D/S 2000 Wanderlodge LXi N/S |
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