Heatraq Help Centre
How can we help?
Find practical water-heater advice, identify the correct spare part or get help from the Heatraq team.
Try “Megaflo no hot water”, “immersion heater” or a manufacturer part number.
Find the correct spare part
Use our identification guides to match your heater, model and component.
Identify a spare part →Troubleshoot a problem
Explore practical guidance for common water-heater symptoms and faults.
Browse fault guides →Ask the Heatraq team
Send us your model details and photographs if you are still unsure.
Contact Heatraq →Popular advice
Popular help guides
Clear, practical guidance to help you identify parts, understand common problems and choose the right replacement.
Spare-part help
How to Identify the Correct Heatrae Sadia Spare Part (Engineer Guide)
Use the model, serial number and existing component details to identify the correct replacement part before ordering.
Read the guide →
Fault finding
No Hot Water from My Megaflo? A Complete Troubleshooting Checklist
Understand the common reasons a Megaflo cylinder may stop producing hot water and the checks that can help identify the cause.
Read the guide →
Buying advice
Immersion Heater Length Guide: 11, 14 & 27 Inch
Learn how to check the length, fitting and specification needed when choosing a replacement immersion heater.
Read the guide →
Fault finding
Why Your Immersion Heater Keeps Tripping (And How to Fix It)
Explore the possible causes of an immersion heater tripping the electrical supply and when professional testing is required.
Read the guide →
System advice
Why Is Water Coming Out of My Tundish? Causes, Fixes & When to Take Action
Find out what a tundish does, why visible discharge matters and what it could indicate about an unvented hot-water system.
Read the guide →
Fault finding
Heatrae Sadia Express & Multipoint Won't Heat? Common Faults, Symptoms and Fixes Explained
Work through common reasons an Express or Multipoint water heater may not heat and identify the appropriate next step.
Read the guide →Explore the help centre
Browse advice by topic
Choose the area most closely related to your product, component or problem.
Spare-part identification
Identify the correct replacement using model numbers, serial numbers and existing component details.
Find the right part →Water-heater troubleshooting
Explore practical guidance for common heating problems, warning signs and possible causes.
Browse fault advice →Immersion-heater advice
Learn about heater lengths, materials, thermostats, electrical faults and replacement choices.
Explore immersion advice →Hot-water system components
Understand valves, tundishes, expansion controls and other important system components.
Understand components →Need a little more help?
Still not sure which part you need?
Send the Heatraq team as much information as possible and we’ll help you identify the correct replacement before you order.
- The heater’s full model name and model number
- The serial number from the product data label
- The part number printed on the existing component, if visible
- Clear photographs of the heater, data label and component
Please do not remove or dismantle components solely to take photographs.
The more detail, the better
Clear product details and photographs give us the best chance of matching your heater and component accurately.