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My boiler’s been capped because it was leaking CO. What should I do?

My boiler has been capped

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Having your central heating boiler capped due to carbon monoxide (CO) can be unsettling to say the very least.  It can give rise to all sorts of fears and worry.  However, catching the issue is the first step towards ensuring your home stays safe.

Carbon monoxide is a dangerous gas, but once the problem has been identified, you’re already on the path to a safer environment.

PLEASE NOTE – your boiler will only ever be capped by a registered/competent engineer. This means that more often than not, they will be able to carry out the required repair or replacement for you. While we’re giving advice and guidance in this article, we want to make it clear that if you find yourself in a situation where your boiler has been capped, the company who’s capped your boiler will more than likely be able to solve the problem for you and you should be wary of any company jumping on an opportunity to gain new work from your unfortunate situation.  If that doesn’t make sense and you want to chat – reach out.  We’re here for you.

Here’s a guide to the steps you need to take and don’t forget, we’re here to provide the support you need along the way.

Why has your boiler been capped?

A boiler gets capped when it produces carbon monoxide due to issues like faulty combustion, poor ventilation, or problems with the flue system. CO is a colorless, odorless gas that can cause serious health problems, including headaches, dizziness, unconsciousness, and even death. Capping the boiler is a safety measure to prevent further emissions, keeping you and your family safe.

What should you do in the event of your boiler being capped?

1. Don’t panic

The immediate danger has passed once your boiler has been capped. This step alone protects your home from further CO exposure.  So right now, take comfort in knowing you’re safe.

2. Contact a professional

You need a Gas Safe registered engineer to diagnose the issue and provide a solution. The company who capped the boiler could be the right person to help you fix the situation. DO NOT attempt to fix the boiler yourself – reach out and get help. When you contact Precise for a capped boiler we will prioritise your case and send you a qualified engineer quickly.

3. Arrange temporary heating

While you’re waiting for repairs, consider using electric heaters to keep your home warm, particularly if you have vulnerable family members, like young children or the elderly.

4. Install carbon monoxide detectors

If you don’t already have a CO detector, now is the time to install one. These detectors provide an early warning if carbon monoxide leaks occur, giving you peace of mind even after your boiler is fixed – once bitten, twice shy and all that…

5. Don’t be afraid to ask questions

It’s normal to have concerns during this time. Our engineers will explain what went wrong, how we’ll fix it, and what steps can be taken to prevent future problems. We’re not just here to repair your boiler; we’re here to help you feel reassured and safe in your home.

Here are our commitments to you when you have a capped boiler:

Rapid response

We prioritise cases involving carbon monoxide leaks, so we’ll respond quickly to get your heating system back on track.

Thorough inspection and repair

Our Gas Safe engineers will diagnose the problem, identify the cause of the CO leak, and explain the repair process. Whether it’s just a part that needs replacing or the boiler itself, we’ll keep you informed at all times – with clear costs and timelines.

Testing and reassurance

Once repairs are complete, we’ll thoroughly test your system to ensure it’s running safely and efficiently. We’ll also explain any adjustments we’ve made to give you full confidence in your heating system.

Being there for you

Having your boiler capped due to carbon monoxide can be stressful and disruptive, but rest assured, we’re here to support you every step of the way. Your safety is our top priority.

Though this situation may feel overwhelming, rest assured, if you do what we’re suggesting here, you’re handling it the right way. Reach out to us, stay warm and let us take care of the rest.

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