By Jad Salman · · All guides
The first properly cold week of the year does something odd to a plumber's phone. Boilers that limped through summer give up the moment people turn the heating on, and suddenly everyone wants you today. Pressure's dropped, the pilot won't light, the radiators upstairs are cold, there's an error code flashing and nobody knows what it means.
It's the busiest stretch of the year for a lot of heating engineers, and it's also when most work gets lost. Not because you're turning it away, but because you can't physically answer the phone with your head in a boiler cupboard. This guide is about getting through the winter rush without burning out, missing the good jobs or filling your diary with the wrong ones.
Why Winter Is Different
Most of the year, a missed call is annoying. In winter, it's usually gone for good. Someone with no heating and a toddler in the house isn't going to wait for your callback at 7pm. They'll ring the next number on Google, and the one after that, until a human picks up.
Winter calls also tend to bunch up. A cold snap on a Sunday night means a pile of calls on Monday morning, all at the same time you're already on your first job. And the calls are more mixed than usual: genuine breakdowns, people who just need to repressurise their boiler, landlords chasing a tenant's complaint, and a few who want a new boiler quoted "while you're here".
If you want a feel for how many calls slip through on a normal week, our piece on how many calls plumbers miss is a good starting point. In winter, that number usually goes up, not down.
Get Ready Before the First Cold Snap
The plumbers who cope best with winter usually do a bit of prep in October and early November, while things are still manageable.
- Decide your winter hours now. Are you doing evenings? Saturdays? Sunday emergencies? Decide in advance, rather than at 9pm when someone's pleading with you.
- Decide your call-out terms. If you charge more out of hours or for same-day breakdowns, have the wording ready so you say it the same way every time. Our guide to pricing plumbing jobs covers how to set call-out charges.
- Stock the van for the usual suspects. You'll know which parts fail most on the boilers in your area. Having them on board can be the difference between a one-visit fix and a second trip.
- Check your Gas Safe registration covers what you'll be asked to do. If you're not on the register for gas work, be clear about that on the phone so you don't waste your time or theirs.
- Sort out your voicemail greeting. If someone does reach voicemail, it should tell them what to do. We've got voicemail greeting templates for trades, including wording for emergencies.
Triage: Not Every "No Heating" Call Is the Same
In a rush, the biggest time-saver is sorting calls quickly into what needs you today, what can wait a few days, and what doesn't need you at all. A simple set of questions does most of the work.
1. Is there a smell of gas, or any sign of carbon monoxide? If someone mentions a gas smell, they should ring the National Gas Emergency Service on 0800 111 999 straight away. If anyone has symptoms like headaches, dizziness or sickness that ease when they leave the house, or a CO alarm is going off, they should get out and get help. That's not a booking, and whoever answers your phone needs to say so clearly.
2. Is anyone vulnerable in the house? Elderly customers, young babies and people with health conditions are the ones where no heating really matters. Plenty of plumbers move these up the list, and it's worth asking the question.
3. Do they have heating, hot water, both or neither? "No hot water but the radiators are fine" is a different job, and a different level of urgency, from "nothing's working".
4. What does the boiler say? Ask for the make, rough age and any error code on the display. It helps you guess the likely part and decide whether you can fix it in one visit.
5. Have they checked the pressure? A lot of winter calls are low pressure. Some plumbers are happy to talk a customer through checking the gauge; others prefer to just go. Either way, knowing the answer before you arrive saves time.
6. Are they a tenant? If they rent, the landlord or letting agent usually needs to authorise and pay for the work. Find out who's paying before you drive over.
Write these questions on a card, stick it in the van, and use the same order every time. You'll be surprised how much quicker calls get.
Protect Your Diary
The temptation in winter is to say yes to everything and squeeze it all in. That's how you end up doing a boiler swap quote at 8pm on a Friday, exhausted, and getting it wrong.
A few rules that help:
- Keep a small gap each day for breakdowns. Even an hour or two lets you take the urgent job without cancelling someone else.
- Batch by area. Try to keep same-day breakdowns within a sensible radius of where you already are. If your morning is on one side of town, offer the jobs nearby first.
- Push non-urgent quotes back a little. A new boiler quote is valuable work, but it can usually wait a week. Book it in properly instead of dropping it into a breakdown day.
- Confirm every booking in writing. A quick text with the date, time window and address cuts down on no-shows and "I thought you said Thursday" calls.
- Get paid on the day where you can. Winter breakdowns are often one-off customers. Our guide on getting paid on time covers card payments and deposits.
Don't Lose the Calls You Can't Answer
All of this falls apart if the phone just rings out. You've got a few options, and most plumbers end up using a mix.
Voicemail with a good greeting. Free, and better than nothing, but a lot of people won't leave a message when they're cold and stressed. They'll ring the next plumber instead.
A missed-call text. Some phones and apps can send an automatic text when you miss a call. It at least tells the customer you exist and will get back to them.
Call divert to someone else. A partner or family member can cover the phone for a few hours, but in a busy week that's a lot to ask. Our guide to call forwarding for plumbers explains how to set up a divert on most UK networks.
A call handling service. A human answering service takes messages, and some will book for you. It works well for some trades, but cost per call adds up quickly in a busy season. We compared the options in AI receptionist vs answering service.
An AI receptionist. This is where AI call handling has really come on. A good one answers every call, asks your triage questions in the same order every time, tells callers to ring 0800 111 999 if they mention gas, and can book straight into your diary rather than just taking a message. Callers should always be told they're speaking to an AI, and you should be able to see exactly what was said.
Where Slotby Fits
This is the problem we built Slotby for. It's an AI receptionist for UK tradespeople that answers the calls you miss, asks the questions you'd ask, books the job into your diary and texts you a summary. When the phones go mad in November, it means the breakdown call at 10:15 while you're elbow-deep in a combi still turns into a booked job instead of a lost one.
If you're curious, there's more on how it works for plumbers, and you can see the plans on our pricing page. You don't need it to follow anything else in this guide, though.
A Quick Winter Checklist
- Winter hours and call-out charges decided and written down
- Common parts for local boilers stocked on the van
- Triage questions on a card, in the same order every time
- Gas and carbon monoxide safety wording ready for every call
- A daily gap kept free for breakdowns
- Booking confirmations sent by text
- A plan for calls you can't answer, whether that's divert, voicemail, an answering service or an AI receptionist
The Bottom Line
Winter is when customers need you most and when they're least patient. The plumbers who do well aren't necessarily the ones who work the longest hours. They're the ones who sort calls quickly, protect their diary, and make sure nobody with a cold house gets an unanswered phone. Get those three things right and the rush becomes the best few months of your year rather than the most stressful.