Mersey Heat Works Docs

call-out: workshop@merseyheatworks.online Bold Street 53, L1 4EU Liverpool

liverpool · leeds & liverpool canal · liverpool canal link

Narrowboat diesel heater repair and servicing for Liverpool canal liveaboards

We are a two-engineer workshop on Bold Street that works almost exclusively on boats. If your Webasto locks out at 3 am, your Eberspächer smokes white and refuses to run, or your Refleks drip-feed is sooting up the flue, this is the page that tells you exactly what we do, how we do it and what it costs.

Most of our work is mobile: we come to you at Salthouse Dock, Canning Half Tide, the Liverpool Canal Link moorings, Litherland, Aintree, Melling, Maghull and up the towpath as far as Burscough. Bench work — burner strip-downs, control-unit testing, pump rebuilds — happens at the Bold Street unit while you stay warm with a loan heater.

Liveaboard priority. If the boat is your only home and you have no working heat, say so in the first line of your message. No-heat liveaboard jobs are placed ahead of routine servicing, and we carry loan 2 kW diesel units for the gap.

coverage
Liverpool city centre docks, Stanley Flight, Leeds & Liverpool to Burscough
units
Webasto, Eberspächer, Mikuni, Hurricane, Kabola, Refleks, Wallas
engineers
Dan Whitfield (marine heating, 14 yrs) & Priya Raman (12 V electrics)
founded
2016, moved to Bold Street 53 in 2021

Services

Each block below is a job we actually book, with the work included and a realistic time on the boat. Everything is carried out to the heater manufacturer's service schedule and recorded for your Boat Safety Scheme file.

Annual diesel heater service

The yearly strip, clean and re-test that keeps a forced-air heater from coking up over a damp Mersey winter. Burner head removed, combustion chamber de-sooted, glow pin and screen replaced, fuel dose metered, exhaust and air intake checked for blockage, then a full burn cycle under load with a flue gas reading.

on board
2–3 hours
includes
Glow pin, gaskets, fuel filter, written report
best booked
September to early November

No-start and lock-out diagnosis

Flashing fault lamp, repeated F02, or a heater that fires then dies after ninety seconds. We read the controller codes, test the dosing pump pulse, measure voltage drop at the loom under start current, check fuel pick-up and standpipe depth, and separate a genuine burner fault from the far more common flat-battery or airlock cause.

on board
60–90 minutes
outcome
Named fault, parts list, fixed-price repair quote
note
Diagnosis fee credited against the repair

Burner, heat exchanger and pump replacement

When a unit is beyond cleaning we rebuild rather than bin it where parts still exist. Combustion chamber and heat exchanger swaps, dosing pump replacement with correct stroke rating, control unit exchange and re-pairing, plus overheat sensor and flame sensor renewal. Genuine or OEM-equivalent parts only, with the old components handed back.

on board
Half day, or bench work at Bold Street
loan unit
Yes, free while yours is off the boat
warranty
12 months parts and labour

Flue, exhaust and skin fitting work

Corroded exhaust runs, rattling lagging, badly angled skin fittings dumping fumes back along the gunwale, and Refleks or Kabola flue sections that have sooted solid. We re-route to a safe fall, renew clamps and sleeving, seal the hull penetration properly and carbon-monoxide test the cabin afterwards.

on board
2–4 hours
includes
CO sweep of cabin and cratch with calibrated meter
bss
Work documented for your next examination

Radiator and calorifier circuit tuning

Cold radiator at the bow, lukewarm taps, air locks that return every fortnight, or a circulation pump that whines all night. We balance the loop, fit or relocate bleed points, test the pump head against pipe run, flush and re-dose the system with marine-grade inhibitor and set the stat so the heater is not short-cycling itself to death.

on board
3–5 hours
suits
Wet systems with calorifier and 2–6 radiators
result
Lower fuel burn, quieter running, even heat

Winter preparation and fuel hygiene

The single biggest cause of January breakdowns in the docks is dirty diesel. We dip and sample the tank, check for water and diesel bug, fit a pre-filter and water trap on the heater take-off, raise the pick-up clear of sludge and show you how to dose correctly for your tank size.

on board
2 hours
includes
Tank sample, filter fit, written fuel plan
bundle
Discounted with an annual service

Liveaboard emergency call-out

No heat, in winter, on a boat you live on. Same-day attendance where the boat is reachable from a towpath or dock access point in our coverage area, with a van stocked for the common failures: glow pins, dosing pumps, filters, controllers and loom repairs.

response
Same day Mon–Sat if booked before 15:00
fallback
Loan heater fitted if parts are not in stock
access
We can work from the towpath side, no crane needed

Process

How a job runs from first message to invoice. Nothing clever, but it is the same every time so you know where you stand.

  1. Message with the basics

    Heater make and model if you know it, the fault code or the symptom in plain words, your mooring or dock, and whether you are living aboard without heat. Photographs are not needed — a clear description of the noise, the smoke colour and when it cuts out tells us far more.

  2. Triage reply within four working hours

    We either book you in or talk you through a two-minute check first. Perhaps a quarter of winter call-outs are solved on the phone: a tripped isolator, a stale fuel line after a long cruise, or a timer left on an old schedule.

  3. Attend and diagnose

    Engineer arrives in the agreed window, works mat and boards down, electrics isolated before any loom work. Codes read, pump tested, combustion checked. You get the finding there and then, not a vague follow-up.

  4. Fixed-price quote before any parts go on

    Written on the spot, parts and labour separated, with the honest option included — sometimes that is "replace this unit next spring rather than spend three hundred pounds on it now".

  5. Repair, test and record

    Work completed, full burn cycle run from cold with the system up to temperature, CO sweep of the cabin, old parts returned. You get a dated report for your Boat Safety file and insurance record.

  6. Follow-up at fourteen days

    A short message to confirm the fault has stayed fixed. If it has not, we return at no charge for anything we touched.

Pricing notes

We publish rates rather than hide them behind a quote form. Prices include VAT and travel inside the coverage area.

labour
£62 per hour, charged in half-hour blocks after the first hour
annual service
From £185 for a single forced-air unit, parts included
diagnosis visit
£75, fully credited if you proceed with the repair
emergency
£110 call-out Mon–Sat, £150 Sunday and bank holidays
loan heater
No charge while your unit is on our bench
outside area
£0.55 per mile beyond Burscough, agreed before booking

Two things we will never do: quote a repair without seeing the unit run, and charge you for a part you did not need. If we open a heater and find it is a five-minute airlock, you pay the diagnosis fee and nothing more.

FAQ

My Webasto throws the same fault code every few weeks. Is the unit finished?

Usually not. Repeating lock-outs on a unit that otherwise burns cleanly point to supply rather than the burner: voltage sagging below 10.5 V at start, a dosing pump losing stroke, or fuel drawn from the sludge at the bottom of the tank. We test all three before anyone talks about replacement. Genuine end-of-life looks different — a cracked heat exchanger, heavy coking that returns within weeks, or a corroded chamber.

Can you work on the boat while I am away, or do I need to be there?

Either. Plenty of liveaboards leave a key with the marina office or a neighbouring boat and we send the report by email the same evening. For first visits we prefer you aboard so you can show us how the system behaves day to day, but it is not a requirement. We are DBS checked and carry public liability cover; certificates are available on request.

Is a diesel heater service part of the Boat Safety Scheme examination?

The examination looks at the installation — fuel lines, flue routing, ventilation and the hull penetration — rather than the internal condition of the burner. A service is not mandatory, but a sooted flue, a perished fuel hose or a badly angled skin fitting will fail you. We service to the manufacturer schedule and flag anything likely to be marked at the next examination, so you have time to put it right.

Contact

Workshop and office are at the Bold Street address below. Drop in for parts and advice, or send the form and we will reply with a booking window.

workshop
Bold Street 53, L1 4EU Liverpool
email
workshop@merseyheatworks.online
hours
Mon–Fri 07:30–18:00, Sat 08:00–14:00, winter rota to 19:00
moorings
Salthouse Dock, Canning Half Tide, Stanley Flight, Litherland, Aintree, Maghull, Burscough