dougrainer wrote:
kmb1966 wrote:
dougrainer wrote:
Replace the Rear Control board. Remember the Thermister reading in diag mode is the FIN temp. The actual refer temp will be 10 degrees warmer. Also, a Defective Thermister will test(Ohm) out correctly. But, since you have replaced it, go with the control board. Are you positive the 4 wire quick connect by the interior light has good solid pin connections for the 2 wires to the Thermister? Doug
Hi Doug, Thanks for you input. I think that the connectors by the interior light are OK, (at least they look OK). But it is worth mentioning to you that the internal fans(2) from the ARP Device also connect to the black wire on this interior light. Perhaps that could be the cause of the problem?
Possibly. In 25 years of working on hundreds of 1200's I have never heard or seen this type problem. I thought you stated you disconnected the ARP device and it still malfunctioned? There are 4 wires Positive/Ground(2) for the light. The other 2 go to the Thermister and should not be affected since they are separate. I thought maybe the pins at the connector may have corrosion and causing lack of OHM signal. Doug
I have not disconnected the ARP unit, but I did simply turn it off and test with the same results. I think I should unwire the ARP unit and re-test, or at least unwire the 2 internal fans and re-test. What seems ODD is that I cannot get it to malfunction in the LP-GAS mode.
