1
Venox 250 / Re: Venox overheating - fan / thermostatic not engaging (but tested as working)
« on: July 28, 2018, 03:13:31 AM »OK, you are doing fine! That explanation was the best! You have the right procedure and you are using and interpreting the meter correctly. Your thermal switch is not turning on at the right temperature. Most thermostats and thermal switches have the temperature stamped on them somewhere. If not then you have to go through the time consuming method of slowly raising the temp of your water pan while watching your meter. It is easy to fall asleep! What should the temp be when the switch closes? Since I don't know I would guess (yes, GUESS!) 200 F. Thermostat should open about 190-195 F and the fan kick in about 200 F. Yep. That's my story and I'm stickin' to it! Maybe there is a service manual somewhere that puts factory numbers on this...
OK, you are doing fine! That explanation was the best! You have the right procedure and you are using and interpreting the meter correctly. Your thermal switch is not turning on at the right temperature. Most thermostats and thermal switches have the temperature stamped on them somewhere. If not then you have to go through the time consuming method of slowly raising the temp of your water pan while watching your meter. It is easy to fall asleep! What should the temp be when the switch closes? Since I don't know I would guess (yes, GUESS!) 200 F. Thermostat should open about 190-195 F and the fan kick in about 200 F. Yep. That's my story and I'm stickin' to it! Maybe there is a service manual somewhere that puts factory numbers on this...
Thanks Karl.
According to the service manual, at 90 (+/-2) degrees Celsius (192-196 degrees Fahrenheit) the thermostatic sensor should close the circuit and start the fan. While I did not use a thermometer when I tested both the old and the new thermostatic sensor in a pan of boiling water, it would seem strange that both the old and the new switch exhibited the exact same results where, after dipping the sensor into the boiling water, within seconds the circuit closed. I may have to buy a good thermometer and see if they are closing the circuit within the temp. parameters specified though.
Up until this point, I have not tested the thermostat itself as it would require me to open up the housing and if I do, I believe I would need to replace the o-ring. As parts are hard to find and I usually end up having to wait 2 weeks for them to arrive in the mail, I haven't yet decided if I should look at the thermostat.
Lastly, I don't mean to ask a silly question, but in combing over my bike, I noticed there is a hose that is hanging and not connected to anything. If I were to sit on my bike, it is on the right side. I have attached two photos. The first shows where it's connected to, the second photo shows how it hangs. Is this normal or is it supposed to plug into something. I didn't see a place that it should go to and there isn't sort of indication that was ever plugged into anything (no indentations indicating a hose clamp was used). Any idea what this is?