Vokera A06 Error Code: Tap Heat Sensor Meaning and Safe Repair Advice

A Vokera A06 error code usually means the boiler has found a tap heat reading problem. On many Vokera models, this points to the domestic hot water NTC thermistor.

This small part helps the control board understand tap demand. It also helps manage outlet heat while the boiler runs.

When the reading looks wrong, the unit could still deliver warm water. However, control at the taps may feel limited, fixed, or unreliable.

A06 is not normally linked to low pressure, radiator flow, or return pipe readings. Instead, it sits within the tap heat sensor category.

What Does Vokera A06 Mean?

Vokera A06 means the boiler cannot trust the tap heat signal.

The NTC thermistor changes its electrical reading as water warms or cools. The board then uses that reading to manage output.

If the signal becomes missing, unstable, or outside range, the boiler may use a restricted mode. As a result, your taps may run warm, but adjustment may not work as expected.

Why the A06 Code Appears

Several problems can trigger this warning. Most involve the thermistor circuit, its wiring, or the control board.

Failed thermistor

The thermistor can weaken with age. Consequently, it may send poor information to the board.

Loose plug or damaged lead

A loose connector, trapped cable, or damaged lead can break the signal. The boiler may then treat the part as faulty.

Weak electrical contact

Damp, dust, corrosion, or heat damage can affect the connector. Even a short break can bring up A06.

PCB reading issue

In rarer cases, the board may misread the signal. Even so, an engineer should test the more common causes first.

Disturbed wiring after recent work

Work near internal cables can sometimes move a plug or harness. Therefore, an engineer may inspect clips and connectors during diagnosis.

Signs You Might Notice

Your taps may run too warm, too cool, or stay at one heat level. You may also find that adjustment no longer responds well.

In addition, A06 could return soon after a reset. The boiler may still run, but tap performance may feel less steady than usual.

These signs do not prove which part has failed. They only show that the boiler has found a tap heat reading issue.

Safe Checks Before Booking a Repair

You could complete a few simple checks without opening the case.

First, check the boiler has power. Make sure the fused spur, timer, programmer, thermostat, and controls are set correctly.

Next, run a tap and note what happens. Does the outlet heat stay fixed, rise and fall, or fail to change?

Then, reset the boiler once using your Vokera manual. If the warning clears and stays away, monitor it closely.

However, if A06 returns, stop resetting it. Repeated resets will not repair a failed thermistor, loose cable, or control issue.

Important safety note: never remove the front cover. Do not test internal wiring, sensors, plugs, PCB parts, or sealed components yourself.

Can You Fix Vokera A06 Yourself?

You could check controls, confirm power, and try one reset. You can also note how the taps behave.

Beyond that, call a qualified heating engineer. Thermistor testing needs safe access, correct tools, and model knowledge.

Therefore, DIY repair is not suitable if the warning comes back.

How an Engineer May Repair It

A heating engineer will test the tap heat circuit step by step. They may check the thermistor, resistance values, wiring, plugs, and PCB response.

They could also look for trapped cables, damaged insulation, corrosion, moisture, or weak contact points. Once they find the cause, they can repair the connection or replace the failed part.

Afterwards, they should reset the boiler and confirm that tap control works correctly.

Does A06 Mean You Need a New Boiler?

Usually, no. Many thermistor and wiring issues can be repaired. However, age, reliability, part cost, and general condition all matter.

If your boiler breaks down often, replacement may offer better long-term value. Even so, arrange a diagnosis before deciding.

How to Reduce Future A06 Problems

Annual servicing helps spot early wear, weak connections, and poor performance. During a service, an engineer can inspect key parts and test safe operation.

Also, act early if tap heat becomes unreliable. A small sensor issue can become more disruptive if ignored.

When to Call a Gas Safe Engineer

Call an engineer if A06 returns after one reset. You should also book help if tap heat becomes fixed, unstable, or difficult to control.

In addition, arrange a visit if the warning appears after recent repair work. A professional can test the circuit safely and confirm the true cause.

Final Advice on Vokera A06

Vokera A06 usually relates to the domestic hot water NTC thermistor or its circuit. It is not normally a pressure, flow, return, or radiator circulation fault.

Try one reset using your manual. If the warning returns, book a repair rather than continuing to reset the boiler.

Regular servicing can also help reduce repeat faults and keep your boiler working safely.