ESP probe.

[richtad]

I've recently purchased an invincible t from a friend and been going the the cleaning and testing phase.
All the motors work. I pulled the esp probe and was testing with an ohms meter and found a very low reading without applying heat, When I put a heating source on the tip, it rose.
Should I get any reading at all when it's applied or should it read open?
Also, if the board is bad, since it's discontinued, where can I get a replacement?
Many thanks,
Rich T

 

[DAKSY]

Do you know the number for the board? Woodman's (http://www.woodmanspartsplus.com/)
carries two different ones, but you'd hafta see if one of them is correct.
If it isn't you'll hafta ask a Harman dealer if one's still available.

 

[Bioburner]

Someone did a conversion to a regular p series board and other things making the stove up to date. They did it after I passed on a $250 Invincible

 

[Mr. Spock]

Thermocouples usually work or they do not. However to test one can use a volt meter that can measure micro-volts.

The charts available on this link below can be used to determine if the thermocouple is producing the correct voltage for a given temperature. I understand most thermocouples used in pellet stoves are of the k type.

http://reotemp.com/thermocoupleinfo/thermocouple-types.htm