To Next PageTo Next PageHow to fix Flow NTC open circuit in Vaillant Boiler?
A Flow–NTC open circuit can be caused by a broken NTC, a broken NTC cable, a defective connection at the NTC, or a defective connection at the electronics. Check and repair the NTC and connections.
How to fix Return–NTC open circuit in Vaillant Boiler?
A Return–NTC open circuit can be caused by a broken NTC, a broken NTC cable, a defective connection at the NTC, or a defective connection at the electronics. Check and repair the NTC and connections.
How to fix Flow NTC short circuit in Vaillant ecoTEC plus 837 Boiler?
A Flow NTC short circuit can be caused by a defective NTC, a short circuit in the cable harness, or a cable/casing shortcut. Replace the NTC and inspect the cable harness.
How to fix Return NTC short circuit in Vaillant ecoTEC plus 837 Boiler?
A Return NTC short circuit can be caused by a defective NTC, a short circuit in the cable harness, or a cable/casing shortcut. Replace the NTC and inspect the cable harness.
How to fix Tank NTC short circuit in Vaillant Boiler?
A Tank NTC short circuit can be caused by a defective NTC, a short circuit in the cable harness, or a cable/casing shortcut. Replace the NTC and inspect the cable harness.
General| Model | ecoTEC plus 837 |
|---|---|
| Category | Boiler |
| Output | 37 kW |
| Dimensions | 720 x 440 x 338 mm |
| Flow Rate | 15.2 l/min |
| Mounting | Wall-mounted |
| Fuel Type | Natural Gas |
| ErP Heating Efficiency Class | A |
| ErP Water Heating Efficiency Class | A |
| Warranty | 5 years |
| Type | Combi |
| Efficiency | 89.3% |
Guidance on documentation, safety symbols, applicable documents, and CE marking for clarity and compliance.
Introduces ecoTEC combination and system boilers, highlighting their features, benefits, and general notes.
Covers CE marking, gas council numbers, and general installation requirements for safety and regulatory compliance.
Comprehensive technical specifications including heat output, dimensions, electrical data, and performance metrics for ecoTEC models.
Diagrams illustrating boiler dimensions and function elements for installation planning and component identification.
Requirements for water circulation systems, filling, electrical supply, and safety precautions.
Instructions for safely transporting, unpacking, mounting the boiler, and fitting the hanging bracket.
Detailed steps for connecting gas, cold water, hot water, and flue systems, emphasizing safety.
Details on electrical connections, wiring diagrams, control panel overview, and accessory connections.
Procedures for preliminary electrical, gas, and water checks, and filling/bleeding the heating system.
Steps for filling the heating system, checking pressure, and using the filling loop for ecoTEC plus boilers.
Procedures for checking gas supply pressure and rate, and refitting the boiler case.
Guides on adjusting central heating output, gas changeover, and performing initial functional checks.
Steps to verify correct operation of heating and hot water functions, using status displays.
Procedures for final system flush, handing over to the user, and explaining operation and maintenance.
Safety instructions and recommendations for initial boiler inspection and routine maintenance tasks.
Overview of annual inspection and maintenance tasks, including checks for flue, burner, and heat exchanger.
Detailed procedures for removing, cleaning, and refitting the burner module and its components.
Instructions for cleaning the condensate siphon and checking the expansion vessel pressure.
A systematic guide to troubleshooting common boiler faults before consulting specific fault codes.
Explanation of status codes and diagnostic codes to identify appliance operating conditions and faults.
A comprehensive list of fault codes, their meanings, causes, and how to access the fault memory.
Critical safety instructions to follow before replacing any boiler component to prevent damage or injury.
Step-by-step guides for replacing major components like the burner, fan, gas valve, and heat exchanger.
Guidance on proper recycling, disposal of the appliance, and information on Vaillant service.
Regulations, standards, and planning considerations for 60/100mm air/flue duct layout and termination accessories.
Maximum flue lengths for ecoMAX/ecoTEC, and installation guides for sliding sleeves, horizontal, vertical, and terminal kits.
Instructions on how to add extensions and elbows to the 60/100mm air/flue duct system.
Regulations, standards, and planning considerations for 80/125mm air/flue duct layout and termination accessories.
Maximum flue lengths for ecoMAX/ecoTEC, and installation guides for connection pieces, sliding sleeves, horizontal, and vertical ducts.
Instructions on how to add extensions and elbows to the 80/125mm air/flue duct system.
Overview of appliance features, safety precautions, emergency procedures, and intended use of the ecoTEC boiler.
Guide to operating the boiler, including control panel overview, initial checks, and turning the boiler on.
Instructions for setting domestic hot water temperature, warmstart function, and heating operation.
Understanding status displays, troubleshooting common issues, and turning off the boiler.
Information on frost protection features and the importance of regular maintenance and customer service.
