Newbie here with a completely dead Max-E-Therm 400LP. I searched but could not find the answer to my problem. The heater is about 3 years old and have not had the best luck with it. I have needed to replace the thermal regulator twice, high limit swich, thermistor and the firemans switch fuse! This time the entire unit is dead.
After some troubleshooting with the owner manual I believe I have a bad control board but wanted an experienced opinion before springing the $$$ on a new one!
The control panel is completely dead with no error codes or LED's lighting up even after a power reset.
I confirmed 240V into the heater. The firemans switch (fuse) is OK
I am reading 24+ Volts AC at the board where the harness plugs in from the firemans switch.
Shorting Pins 5-6 on J6 does nothing.
I would really appreciate any help or advice. If other testing might be helpful let me know.
Thanks in advance.