[tester22]

hi, I have BOSCH Tankless T9800SE 160K BTU showing C1 & C2 errors. Intake pipe distand is 39 foot & Outlet pipe distance is 43 foot, I am having this Machine from last 5 years working fine, but from last couple on months showing this errors. So I did many thing, but none fix the problem, as follow below.

1--I did Camera inspection in Intake & Outlet pipes all clear (not any debris shows).
2--I did Air Filter Clean & Water Filter clean, all clear now.
3--I did DESCALING of Machine.
4--I did Auto Tuning of this Machine to adjust Air & Gas pressure automatically.

After many different things still showing C1 & C2 errors, some time in a week and some time in


When I unplug & replug Machine, at that time at the beginning it will show SOLAR on display (Solar blinking on display for few minutes, after that it will disappear), so what its mean by SOLAR.

[gtospieg]

You understand this thread is for Automotive heating and cooling, right?