cabin heater ranger 27

[nestegg]

I have a new R27 with no cabin heat. I removed heater hoses at the core and there isn't any water getting to the core. Water level in the heat exchanger is right up. Should I try and bleed the heater hoses? Any advise would be appreciated.
Nestegg

 

[knotflying]

If you removed the heater hoses and no water was coming out then how would you be able to bleed them. I just bought a new R-27 and I am not very familiar yet with the systems, but logic tells me that there must be either a thermostat or a manual lever to open a valve to allow the hot water to get into the core. Check to see if the valve is operating. Also, I would think a call to your dealer should give you a good heads up as what to do. I will also look through all my manuals, I seem to remember there is a manual on the heater. If I find anything I will let you know.

 

[knotflying]

Weel, I found the manual related to the heater. There are two types of installation one does use a pump and the other just uses the natural flow through the engine. In the troubleshooting guide they say that if you are not getting heat there could be a kink in one of the hoses. So I guess you need to call your dealer or Ranger to first see if they use a pump for circulating the heated water, if they do perhaps the pump is not working. It could be a fuse or the wiring. If there is no pump, there could be a kink in one of the hoses going to or from the coil.

 

[abcandjrc]

If the heater is factory installed, and I am assuming it is, then I presume it is properly installed. I suspect you are correct that there is simply an air-lock and water has not been forced into the coolant loop.

I have wondered if it would not be good to have a shut-off valve in the system for warm-weather use, but our R21 came without a heater so I can't help you there. I'm sure a call to the factory will clarify that in a hurry. As someone suggested, there may be words in the owner's manual.

I am also assuming it is a Heater Craft unit. While they are currently on my .... list, try looking at the Installation tab on their web site at http://www.heatercraft.com/. There are comments about making sure the hoses are clear, the heater at the proper level with respect to the engine (should be correct on a factory installation), and topping-off the coolant level after putting the heater in service.

 

[nestegg]

Thanks for the info. The factory got back to me and believes that it is an airlock. They have instructed me to take the boat out and bring the engine up to 4000 rpm's for 5 minutes and see if that doesn't clear the airlock.

 

[abcandjrc]

That was also mentioned in the Installation instructions.

Another point made there was that at low RPM circulation would drop and maximum heat would not be available. Looking at our R21 I would guess that the route for water circulation to the heater is a secondary consideration to cooling the engine itself (as it should be). However, having the extra water volume and additional heater core area to cool it might come in handy if overheat conditions were caused by a raw water circulation failure or such. The engine would still eventually overheat, but the time available to detect the problem (like noticing that the exhaust was not ejecting water) would be a bit longer before damage could result.

 

[RProffer]

I hope you get the heater working. It is a great little heater. It will run you out of the cabin on the R21.