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| SP (Single Axle Pusher Unique Issues) If you have a unique issue with your SP model coach and it can't be answered in one of the other forums here, then this is where you can list it....List your SP parts here too. |
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#11
02-13-2022
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Ned- no problem getting the boilers on. Good to hear about not ever needing new fuses, hopefully it is the same situation for me, and I can stop looking for them. I'm wondering about the widget that is attached to the hot hose with zip ties. I see the one under the couch. Do you know where to find the others?
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Joe Williamson Rancho Cucamonga, CA 1991 SP36 since 2019 
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#12
02-13-2022
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Is it a disc-type thermostat? Probably. It makes the 12V connection to the blower when the hose get up to temperature.
The thermostat and blowers get power from a relay in the overhead dash--I can hear that relay click when I press the Primus button on. The disc thermostats are on each heater blower hose. Under foot of bed, another under kitchen counter (good luck getting at that one), and the one under couch. The underbed blower points partially at the walk-thru-bathoom, keeps the tile floor warm.
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Ned Bedinger 1991 SP36 BB Body No. 93327 Since 2012 Last edited by nbedinger; 02-13-2022 at 08:53 PM.
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#13
02-13-2022
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Yes, the disc thermostat. We both have 91 models. Where is it in the overhead dash? I have one under my couch. I don't know where the one in the bedroom is.
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Joe Williamson Rancho Cucamonga, CA 1991 SP36 since 2019
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#14
02-13-2022
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Re-reading you original question
 Blower and thermostat fuses, hmmm. The rear fuse panel is in the cabinet over the bed, on the driver side of the coach. Open the cabinet, take out the carpeted back wall of the cabinet--it may have + screws holding it in--and you will find the small panel there. Originally a pink wire on fuse 16 to the Primus. Another Primus fuse up front in overhead fuse panel: SK3 (fuse #3) in the leftmost block of fuses. There's a group of relays to the right of those fuses. Locate the blower power relay by sound and touch. Press the Primus ON button while you listen and feel each relay. You can feel the one that clicks. If it's dead and doesn't click, you'll probably have to get diagrams (do you have diagrams in the blue box?) and follow wires to locate it. Edit: rear blower is under curb-side drawer in base of bed. Raise the bed and you might be able to see the snap disk without taking the drawers apart. Or it might require taking the drawers apart. IIRC there's a rheostat for the blower in the bathroom, mine's in the base of the sink. Hope this helps!
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Ned Bedinger 1991 SP36 BB Body No. 93327 Since 2012 Last edited by nbedinger; 02-13-2022 at 09:50 PM.
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#15
02-13-2022
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I'll check this out tomorrow. Thanks Ned.
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Joe Williamson Rancho Cucamonga, CA 1991 SP36 since 2019
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