Flarpswitch
Salem, Oregon
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Joined: 04/14/2003
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My 2008 Dodge Sprinter (Mercedes Benz) has a Heater-Booster and I believe the option code is HZ9. The manual does not adequately describe how it works and how it should be used. Searching the Internet has not revealed much in the way of details except that it is Diesel fueled and only operates when the engine is running and coolant temperatures are below 176 deg F. I am not certain if ambient air temperature is a factor. I do not believe that it has ever worked. I have switched it on in cold weather and just assumed it was working as the pilot light comes on. During the whole episode with the transmission trouble I became quite familiar with the whole underside of the Sprinter. I noticed that there are no deposits of any sort on the booster heater exhaust pipe. Does anyone know how to test this unit? I want to make sure it is not working before I bring it in for repair.
Steve
'09 Navion iQ
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sch911
Rochester Hills, MI
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Joined: 04/13/2003
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From what I've found:
HZ9
(Heater Booster 5kW): 5-kW heater booster can be switched on whenever the engine is running. The on/off switch is situated to the right of the light switch. When the heater booster is switched on, a red indicator light comes on in the switch and a symbol lights up in the instrument cluster. After the heater booster has been switched off, the coolant pump and the burner blower continue running for approximately 3 minutes, then switch off automatically.
Sounds like it's limited to operation at freezing temperatures only as well.
* This post was
edited 12/30/11 02:55pm by sch911 *
Chrysler/Dodge/Ram/Jeep Engineer
2003 Damon Challenger 348 Class A - F53 Triton V10
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Flarpswitch
Salem, Oregon
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I got it to work after finding an electrical connection was not completely seated. Some sort of odd retainer clip was not lined up. I did discover that the temperature dial has to be turned up higher to cause the booster heater to fire up. When it does, you can hear it, not as loud as an RV water heater though. I tried it out and the engine warms up faster and there is warm air at the vents sooner. Nice feature for those chilly mornings.
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Chris Bryant
DeLand, Florida, USA
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Joined: 03/26/2003
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Sounds like it might make a good project if you could find one out of a wrecked Sprinter.
-- Chris Bryant
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Old Crows
Texas
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Joined: 09/11/2006
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krell wrote:I got it to work after finding an electrical connection was not completely seated. Some sort of odd retainer clip was not lined up. I did discover that the temperature dial has to be turned up higher to cause the booster heater to fire up. When it does, you can hear it, not as loud as an RV water heater though. I tried it out and the engine warms up faster and there is warm air at the vents sooner. Nice feature for those chilly mornings. \
Krell, Sprinter-Source.com will have all the information on operation of your accessory heater. It is a good thing if you live in the cold north land.
Cheers
Old Crows
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