Gas hobs are a popular choice in many New Zealand kitchens. They heat quickly, give good control while cooking, and are generally reliable.

However, when something goes wrong with a gas hob, many homeowners face the same question: Should you repair it — or replace it?

At Watertight Plumbing, we often find that while repairs are sometimes worthwhile, in many cases replacement ends up being the more practical and cost-effective option.

This guide explains how the process works so you can make an informed decision.

Please note: all pricing mentioned is indicative only. Contact us for a quote.

Typical Cost to Replace a Gas Hob
In most homes, replacing a standard 600mm four-burner gas hob is straightforward.

Generally, we can supply and install a new Parmco 600mm gas hob for: $999 + GST - This includes removing the old hob and installing the new one.

The advantage of replacing the hob is simple:

• You get a brand-new appliance

• The Parmco unit comes with a 7-year manufacturers warranty

• No risk of additional repair costs

• Modern, reliable components

For many homeowners, this provides better long-term value than repairing an ageing appliance.


What Happens if You Choose to Repair the Hob?
If you prefer to repair your existing hob, the first step is troubleshooting the unit.

Troubleshooting allows us to determine what part of the hob is causing the issue and whether the appliance can realistically be repaired.

The cost for this visit is approximately: $247 +GST

During troubleshooting we will:

• Test ignition and burner operation

• Check gas pressure and flame quality

• Inspect components such as taps, thermocouples and igniters

• Identify whether replacement parts are available

One important thing to be aware of is that some older hobs have obsolete parts, making repair not possible.


Typical Gas Hob Repair Costs
Repair costs vary depending on the fault and the parts required. Because gas hobs contain multiple gas and safety components, repairs can become expensive quickly.

Common examples include:

• Igniter replacement: From approximately $317 +GST

• Replacing multiple components: If gas taps, thermocouples and igniters all need replacing, repairs can exceed $1,000 +GST.

Why Replacement Often Makes More Sense
In many situations, the total cost of troubleshooting and repair becomes close to the cost of a brand-new hob.

For example:

Approximate Cost

When repairs approach half — or more — of the replacement cost, installing a new hob is often the better long-term solution. A new hob also eliminates the risk of additional old components failing later.


When Repairs Do Make Sense
Although replacement is common, there are situations where a repair is worthwhile.

For example:

• Gas pressure issues

• Low flame problems

• Minor faults on newer appliances 

If the repair is simple and the hob is still relatively new, fixing the issue may be the most practical option.

We will always explain the situation clearly so you can decide what works best for your home.


Need Help With Your Gas Hob?
If your gas hob is not lighting properly, has weak flames, or has stopped working altogether, we can help.

We can:

• Troubleshoot the fault

• Advise whether repair or replacement is the best option

• Supply and install a new 600mm Parmco gas hob

Contact Watertight Plumbing
If you'd like advice or a quote for a gas hob repair or replacement, get in touch with our team today. 0800426444