Quieting the Tick-Tick-Tick

Exploring Quieter Diesel Heater Pumps

When it comes to keeping your motorhome cosy and warm, Eberspacher Diesel Heaters have long been a trusted name. Renowned for their efficiency and reliability, these heaters can make any journey more comfortable, regardless of the weather outside.

However, as any seasoned motorhome owner will tell you, there’s an all-too-familiar ‘tick-tick-tick’ sound that often comes along with these heaters. This persistent noise is emitted by the diesel heater’s fuel metering pump, and while it’s a small price to pay for warmth, it can sometimes border on the annoying – especially when you’re trying to drift off to sleep.

Let’s take a closer look at this ‘tick-tick-tick’ issue, exploring why it happens and how it can be mitigated. We’ll also introduce you to some quieter alternatives, designed to provide the same warmth and comfort, but without the rhythmic ticking. So, whether you’re a long-time diesel heater user or considering investing in one, read on to discover how to make your diesel heater experience even better.

Erbespacher diesel heater pumps are arguably the quietest on the market

The Ticking Noise Issue

It’s a familiar scenario for many motorhome enthusiasts: you’re nestled in for the night, ready to drift off after a day of travelling, when the rhythmic ‘tick-tick-tick’ of your diesel heater pump begins. It’s not a problem during the day, but at night when everything else is quiet, this persistent noise can become quite a nuisance.

This ticking is not a sign that anything is wrong with your Diesel Heater. Quite the opposite, in fact. The ticking sound you hear is your heater’s fuel metering pump at work, doing its job to keep you warm. Each ‘tick’ is a small quantity of fuel being delivered to the heater, ensuring a steady, comfortable temperature inside your motorhome​.

While it’s comforting to know that the ticking noise isn’t a sign of a malfunction, that doesn’t make it any less bothersome when you’re trying to catch some z’s. Some owners have compared the sound to a burgee halyard tapping against a metal mast – a maddening disruption when silence is what you’re after.

So, what can be done about it?

Well, you’ll be relieved to know there are a few solutions available. Your options are essentially to apply a bit of DIY ingenuity, or to replace your existing pump with a quieter model.

Well, you’ll be relieved to know there are a few solutions available. Your options are essentially to apply a bit of DIY ingenuity, or to replace your existing pump with a quieter model.

1. Enclosing the Pump in a Box

One of the simplest yet effective solutions proposed is to enclose the fuel pump in a box. But not just any box, mind you. To dampen the sound effectively, the box should be filled with a sound-absorbent quilt. The idea here is that the box serves as a barrier that absorbs and blocks out the sound waves before they can escape and resonate throughout your motorhome​.

It’s important to note that if you’re having the diesel heater installed by someone else, this is not part of a standard installation, and you’ll likely be quoted extra. It’s also not always possible to do. The image here shows how space for a box would be challenging if the mount is tight to start with.

Placement of the fuel pump can also be a consideration, however there are limitations imposed from the suppliers of the length of tube pre and post pump.

2. Mounting the Pump on Soft Rubber

Another method to consider involves the use of soft rubber mountings. By mounting the pump on these flexible structures, the vibrations that produce the ticking noise are absorbed and mitigated. This solution has the added benefit of reducing the ‘jerk’ in the pipe at each beat, which can sometimes carry the clicking noise to the fuel tank and heater​.

Note: All heaters installed by Motorhome Solar come standard with a rubber mount.

3. Forming a Coil in the Copper Fuel Pipes

This method is a little more technical but can be quite effective. If your system uses copper fuel pipes, you could form a coil before and after the pump. This alteration helps to isolate the pulse that is sent into the tank and thus, reduces the noise. This strategy has worked well for some users, and it might be worth considering if you’re up for a bit of tinkering​.

Note: At Motorhome Solar, all our diesel heater fuel lines are a high-density plastic, not copper.

These DIY solutions are quite popular among motorhome enthusiasts, and they could help to make your diesel heater pump a little quieter. They do, however, require a bit of effort and technical know-how. If you’re uncomfortable making these modifications yourself, consulting a professional is always wise.

Another route is to opt for a quieter alternative to traditional diesel heater pumps. This could be an excellent choice if you’re looking for a more straightforward, less hands-on approach to tackling the ticking noise issue.

4. Consider Upgrading to a Newer Diesel Heater

As technology progresses, so does the refinement of diesel heaters. One of the significant advancements made in recent years is the reduction of noise output, especially the infamous clicking sound generated by the fuel pump.

If the persistent noise of your diesel heater is interfering with your peace and tranquillity, it might be an indication that it’s time for an upgrade. The latest diesel heaters on the market are designed with sound reduction in mind, and they are much quieter compared to older models.

These new models utilize innovative technology and construction materials to dampen the sound produced during operation. By focusing on this aspect, manufacturers are able to offer products that provide the warmth you need without the noise you don’t.

So while it can be frustrating to deal with a noisy diesel heater, there are several solutions to this problem. Whether you decide to isolate the sound, modify the installation, or upgrade to a newer, quieter model, you have options. Explore these solutions to find what works best for you, and get back to enjoying your time on the road – in warmth, peace and quiet.

Note: Heatspace offer the option to upgrade the supplied pump to a quieter unit. There is still a faint tick, but it’s definitely quieter.

Looking to Upgrade to a Quieter Diesel Heater?

We’re here to help. Contact us at Motorhome Solar to discuss your options and discover the perfect solution for your motorhome.