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Old 03-08-2011, 11:49 PM   #1 (permalink)
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Unhappy poor heater

I've just bought my first samurai last friday to use in Arizona for desert running. The heater doesn't kick out much heat and last Feb I was in Arizona looking at houses and the water hose to my 5th wheel froze. In my studying of samurais' I've learned that poor heaters are a common problem. As it is with mine. Someone must have solved this problem and I sure could use some help. My wife's idea of roughing it is a chrysler 300c. If I want her to go with me in the samurai this problem has got to be solved for morning driving. Please help!
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Old 03-09-2011, 12:28 AM   #2 (permalink)
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Have u cleaned the debris out of the heater chamber above the core ?
U can see it if u take the ducts off the side of the chamber at tranny tunnel
level below the radio. R u sure the rad fluid is getting to the heater core. That switch in the heater hose has been known to freeze (corrode) seize closed. Goop,LPS,WD40 or other spray can sometimes free it up to move.
It is said that u might be able to get a vacuum hose into the chamber if u drill a hole with a hole saw just above the core...of course if u hit the core it is all over. The holesaw only needs to be vac/hose size. Cover with ducttape.
If u take the dash out to expose the heater, u can then vacuum the leaves and detritus out and reassemble. Worked for me. Before u take it all apart tho u might check to see that all the heater ductwork is connected to the outlets to the dash and defrost at the windshield.
If the fan is working then it will push some heated air into the cabin and to the w/s. The vents on the dashside near the mirror should push warm air.
If the fan is not working then little or no heat will arrive inside with u.
It is a Suzuki quirk that the fan switch will go south. The fan will usually be ok even when the switch has to be replaced.
The fan switch is common to most Suzuki vehicles near the age of urs. My donor switch came from a 3 cylinder car. Check the auto wreckers.
Cleaned the heater box, replaced the switch, loosened the fluid switch and good to go. Avoid taking the dash out if u can...it is time consuming work.
Get ur wife a good lined jacket for the Arizona cold and u will get kudos for both the heater and the heater(jacket) wink, wink, nudge, nudge !!
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Old 03-09-2011, 09:46 AM   #3 (permalink)
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Cool

Arlo is right the only other thing I have seen is the doors and cables corroding and sticking. look under dash in center and move controls watch cables levers and doors for correct operation. I had to just manually set the doors for heat and some defrost that is all I use.
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Old 03-09-2011, 11:06 AM   #4 (permalink)
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Default poor heater

thank you for getting back to me. i will try your suggestions and see if that fixes the problem. does anyone know if a heater from some other make or model could be adapted to work and really fix the problem? it appears that fixing the original samurai heater is a stopgap measure.
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Old 03-09-2011, 08:26 PM   #5 (permalink)
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My heater wasent working well because the cable that controls temp. is not atteched well at the valve and the cable housing slips not letting the valve open fully. I moved it manualy and heat comes out hot but only at the lower level my dash vents only blow cold air. Any Ideas Why?
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Old 03-09-2011, 09:06 PM   #6 (permalink)
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drill 2" hole in heater box and blow/vacuum out debri. you will get over a pint of trash. you will have mucho heat. there is a writeup on zukikrawler
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Old 03-09-2011, 09:16 PM   #7 (permalink)
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Try these...

Basic cleanup:
Cleaning the Heater Assembly

Drill and vacuum:
Cleaning out the Heater Box
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in old El Paso...
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Old 03-10-2011, 08:46 AM   #8 (permalink)
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THOSE ARE NICE! That first one is kind of funny. good info
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Old 03-10-2011, 12:24 PM   #9 (permalink)
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i did #2, when you suck out the trash, it helps to use a blow gun to blow the trash around. heat galore
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Old 03-10-2011, 03:31 PM   #10 (permalink)
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Ive done the heater box vacume several times and it works like a champ!!!
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