Here's an update on my heater troubleshooting, it's been a while and this thread is many pages long, so first a recap:
- Performed a DIY install of the Espar M2 B4L with the Espar standpipe
- The heater fan would run, but heater itself would not start (Error code P000223)
- Contacted Espar support in Canada and they had me send them the ECU which they reflashed.
- Updated ECU allowed heater to function and I thought all was good since I didn't run it for more than 10 minutes
- Months later, I attempted to run the heater for longer periods of time and discovered that the heater would shut down with
P000129 (Flame cutout within the control range 75% – 100% ) and occasionally
P000342 (Invalid configuration, Check ADR coding).
So now I pick up with additional steps from the troubleshooting guide and Espar tech support:
- tested at sea level, I live at about 7250 feet, no difference
- purchased and installed a voltage regulator so the power source is now 12.44 volts instead of 13.5v of the lithium battery - no change
- purchased & installed a new fuel metering pump - no change
- performed the 60 second fuel quantity test many times, results in about 5ml each time when 8.1ml is the desired quantity
- performed fuel quantity test with alternate fuel metering pump, same result
- Since the fuel quantity test was low, I suspect an impingement between the fuel tank and the Espar fuel metering pump. I repeated the fuel quantity test with a gas can as the fuel source and a different piece of Espar fuel line, same result (5ml instead of the desired 8.1ml)
- is it possible I got 2 bad fuel metering pumps that behave nearly identically?
- I'm relatively confident that the fuel line from the van sending unit to the heater fuel metering pump is clear since the gas can test produced the same results.
- the heater ECU could still be bad?
- the Easy Start Pro controller could be bad?
- start over with a whole new kit? $$$
- ThermoKing service center? $$$
I've sent this info to Espar support. I haven't seen any posts anywhere on the web that anyone has had to go this deep into troubleshooting one of these heaters and I think Espar support has exhausted their bag of tricks for me.
Anyway, thanks for reading.