GREENSTAR HIGHFLOW 440 bosh floorstanding

Losing pendant displays on cool to cold mornings with your Bosch Highflow 25 EC hot water heater could be caused by temperature-related issues affecting the display module. Cold temperatures can affect electronic components, causing them to malfunction. It's possible that there could be a loose connection, moisture buildup, or a fault in the display module itself. I'd recommend contacting Bosch customer support or a qualified technician to diagnose and fix the issue.

Error Code: P0440
Fault Location:
Evaporative Emission (EVAP) System - Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Soution:
Check Evaporative Emission (EVAP) System Sealing.
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .

Error Code: P0441
Fault Location:
Evaporative Emission (EVAP) System - Incorrect Flow Detected
Possible Solutions:
Check Evaporative Emission (EVAP) Canister Purge Regulator Valve .
Perform Output Test.
Check Evaporative Emission (EVAP) Canister Purge Solenoid Valve .
Check Evaporative Emission (EVAP) Canister.
Perform Basic Setting.
Check Pipes between Tank Breathing and Throttle Body.

Error Code: P0446
Fault Location:
Evaporative Emission (EVAP) System, Vent Control - Circuit Malfunction
Possible Cause:
Wiring harness.
Evaporative emission (EVAP) canister purge valve.
Engine control module (ECM).

contact maplin electronics they are really good at replacement units.

Open following link for Bosch troubleshooting resources, including contact phone numbers and possible manuals.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

If the conversion was made 3 years ago without a problem since, it might not be a factor.

fuser unit error

A 440-1 is a black drum motor lock. The waste toner in the black pcu is backed up, more then likley. It is not easy to fix. You could replace the black pcu but it will happen again. The usual problem is oil in the main waste toner system. It clumps up the toner and clogs the part where all the waste toner comes together for entry into the waste toner bottle.

http://homeappliance.manualsonline.com/ex/thread/view/idThread/1696702

hello, you problem is a color(cmy) pcu motor lock, the motor is damage or exist a mechanical problem whit the pcu's

Hi. I had the same problem with my Bosch washing machine and called Bosch...was told the same thing...$99.00 for service call. I managed to fix my problem by doing the following:

• Removed hot & cold water supply hoses.
• Took filter screens out of both hoses.
• Removed filter from cold inlet on back of washing machine. I noticed some oily buildup on both of the cold screens so opted to not put any of them back in.
• Then I put hot & cold water supplies back on the wall hookup, but crossed the lines where they came into the back of the machine intentionally so that the hot water line fed into the cold side of the washing machine and vice versa.
• Then I ran a couple loads on "cold" which was actually hot water coming in to the machine.

The reason I did this was that I figured there must be some more waxy buildup inside the machine in the cold lines and hoped the hot water would melt it like when you rinse a greasy pan under hot water. IT WORKED!!! I hope this helps you.

i have the same boiler and this code refers to gays suply error, i would suggest a engineer to yake a look at it but first check if ur gas suply is ON ...!