How Wigan Gas Engineers Can Use AI to Send Automated Annual Boiler Service Reminders
You're a gas engineer in Golborne. You service a boiler in March. The customer is happy, pays up, and says they'll be in touch next year. Twelve months later, you're quiet in March and have no idea that same customer has just booked with someone else, not because they preferred a different engineer, but because no one reminded them. That job, and probably the next five years of annual services, are gone.
This happens constantly. Most gas engineers in Wigan are losing repeat business not to better competitors, but to silence. Customers don't remember the date of their last service. They don't keep track. But they will respond to a reminder, especially one that arrives at the right time with clear, professional messaging. AI and basic CRM tools make it straightforward to set this up once and let it run.
The Revenue You're Losing Without Reminders
An annual boiler service in Wigan typically runs between £70 and £100. If you service 200 boilers a year and only half rebook because no one followed up, that's 100 lost jobs at £85 average, which is £8,500 in missed recurring revenue. Add in the Gas Safe certificate renewals, any repairs identified during the service, and the occasional boiler replacement referral, and the number is significantly higher.
The customers who forget to rebook aren't disloyal. They're busy. A well-timed message from you is often all it takes to get them back on the books. Without it, they'll Google "boiler service near me" when the boiler starts playing up, and they'll book whoever shows up first.
Setting Up a Simple Customer Database
You don't need expensive software to start. A spreadsheet works. Create columns for: customer name, address, phone number, email, last service date, and boiler make and model. After every service, add the customer's details and log the date.
Once you have that list, you have the foundation for a reminder system. If you want to keep it simple, set a calendar reminder to review the list monthly and send messages to anyone whose service anniversary falls in the next 30 days.
For something more automatic, GoHighLevel and HubSpot both offer CRM functionality that can trigger reminder messages based on a date field. You enter the service date, tell the system to send a message 30 days before the next anniversary, and it runs without you touching it again. GoHighLevel in particular is popular with small trade businesses because it handles SMS, email, and even voicemail drops from one platform.
Connecting It All with Zapier
If you're already using a job management tool like Jobber, Tradify, or Commusoft, you may be able to connect it to a messaging tool using Zapier. Zapier links apps together without any coding. A basic workflow might look like this: a job is marked as complete in Tradify, the customer details and job date are sent to a Google Sheet, and Zapier checks that sheet daily and fires an SMS reminder 330 days after the job completion date.
Setting this up takes an afternoon. Once it's running, every customer you complete a service for goes into the reminder queue automatically.
Writing the Reminder Messages with AI
The message itself matters. A reminder that sounds like a generic bulk text gets ignored. One that mentions the customer's boiler, uses their name, and explains the benefit of rebooking gets results.
Use ChatGPT or Claude to write a set of message templates. Give the AI some context and it will produce several options in seconds.
Example prompt for ChatGPT:
"Write three SMS reminder messages for a gas engineer in Wigan to send to customers 30 days before their annual boiler service is due. Each message should be under 160 characters, use the customer's first name, mention it's nearly time for their annual service, and include a call to action to book. Keep the tone friendly and professional."
A typical output might look like:
"Hi [Name], your annual boiler service with [Your Name] is due next month. Book now to keep your boiler running safely this winter. Call or text [number]."
You can create variations for SMS and email. The email version gives you room to mention any Gas Safe certificate renewals, a current offer, or the benefits of keeping the boiler serviced (lower bills, fewer breakdowns, warranty compliance).
For email reminders, ask Claude to write a 150-word version that includes a subject line, a brief explanation of why annual servicing matters, and a clear booking link. Save these templates and use them every time.
Upselling Gas Safe Certificates in the Reminder
If you work with landlords in Leigh, Hindley, or anywhere else across Wigan, the service reminder is a natural place to mention CP12 renewals. Landlords are legally required to have a Landlord Gas Safety Record every 12 months. Many lose track of the date and welcome a prompt.
Add a line to your landlord reminder emails that reads something like: "If the property's Gas Safety Certificate is also due for renewal, we can carry out both on the same visit, saving you time and a second call-out fee."
This one line increases the average job value and makes life easier for the landlord. It's not a hard sell. It's useful information delivered at the right moment.
You can ask ChatGPT to draft a version of this for both SMS and email. Ask it to keep the tone practical and avoid anything that sounds like a sales pitch.
Tracking Who Responds
Once your reminders are running, keep track of the results. In your spreadsheet or CRM, note who responded, who booked, and who didn't. After a few months you'll have a clear picture of which message format works best and whether a follow-up is worth sending.
If someone doesn't respond to the first reminder, a second message two weeks later often converts them. Again, you can write this in ChatGPT and load it into your automation sequence. A simple follow-up like "Just a reminder that your annual boiler service is coming up" sent ten days after the first message will catch the people who missed it or meant to reply and forgot.
GoHighLevel and HubSpot both have reporting built in so you can see open rates, click rates, and conversion rates without pulling numbers manually.
What This Looks Like in Practice
A gas engineer in Aspull with 180 regular customers sets up a Google Sheet with service dates. They use Zapier to trigger an SMS via GoHighLevel 30 days before each anniversary. The SMS was written using ChatGPT and takes the customer's name and boiler brand from the spreadsheet. Landlord customers get a second message that mentions the CP12 as well.
In the first three months, they recover 22 services that would previously have gone unbooked. At £85 each, that's £1,870. The GoHighLevel subscription costs £97 a month. The Zapier plan they're on is £20 a month. The system pays for itself in the first week it runs at full capacity.