The call that cannot wait, and the call that can
Night calls to an HVAC or plumbing company are mixed. Some are emergencies: a gas smell, water coming through a ceiling, sewage in a basement. Many are not: a slow drain, a thermostat that blinks, a question about an invoice. This page is the triage side of after-hours answering for contractors. The job of the system, whether it is your staff, an answering service or an AI assistant, is to sort the two kinds of call in the first minute and send each one to the right next step.
This is a plan you can adapt. It is not a safety standard or legal advice. Your lead technician should agree the list before you use it, and the gas utility and fire service in your area set the rules for gas and carbon monoxide.
Start with safety, not the job
Ask the safety questions before you take a name or a job type. A caller who is in danger does not need a quote.
Gas smell: the caller leaves, the utility responds
If a caller smells gas, the first instruction is to leave the building. Tell them not to touch light switches, doorbells, phones or anything that could cause a spark, to go outside, and to call the gas utility’s emergency line or 911 from there. National Grid’s Massachusetts page tells people who smell gas anywhere to go outside and call its emergency number or 911, lists the same things not to touch, and says not to assume someone else has already reported it. If your customers are served by another utility, use that utility’s page and emergency number in the script.
Your team does not diagnose gas leaks and does not send a technician first. After the caller is safe, take the address and a callback number, log the call, and tell the on-call person so they can follow up once the utility has made the building safe.
Carbon monoxide: fresh air, then 911
The CDC lists headache, dizziness, weakness, upset stomach, vomiting, chest pain and confusion as the common symptoms of carbon monoxide poisoning, and warns that heavy exposure can cause loss of consciousness or death. The Consumer Product Safety Commission’s advice for suspected poisoning is to get outside to fresh air immediately, and then call 911. Treat a carbon monoxide alarm the same way: everyone outside, then 911. Do not book a visit.
Sort the rest into three groups
Write this list with your lead technician. The examples below are common starting points for HVAC and plumbing work. Change them to match your trade and your service area.
| Call type | First action | Who it goes to |
|---|---|---|
| Gas smell | Go outside, touch nothing that could spark, call the gas utility or 911 from outside | Nobody on your team is sent first. Log the call. |
| Carbon monoxide alarm or symptoms | Everyone outside into fresh air, then call 911 | Nobody on your team is sent first. Log the call. |
| Sewage backing up, active water leak, burst pipe, water near an electrical panel | Confirm the address and the danger, then offer the after-hours call-out | The on-call technician |
| No heat in cold weather, or no cooling in a heat wave, with an infant, older adult or someone with a medical condition at the home | Confirm the vulnerable person and the address | The on-call technician |
| Slow drain, running toilet, weak cooling, thermostat that blinks | Log the problem and offer the next business morning | The office, the next morning |
| Quote, invoice or warranty question | Take a message and a callback number | The office, next business day |
Keep the emergency group short. Every item you add to it makes the on-call person’s phone ring more often, and a list that everyone ignores is worse than a short one that people follow.
An on-call rotation a caller can rely on
An on-call rotation is only as good as the phone it rings on. Set these rules in writing:
- One primary and one backup. Name both people for each shift. The backup takes the call if the primary has not accepted it within the time limit you set.
- One phone per person on call. The number that rings through at night must be the one the person answers. Test it on a weekend.
- A weekly handover. Pick a day and time for the handover, and write the names in the schedule. Include the open jobs.
- A time you can keep. Decide how long the on-call person has to call back and put that time in the script. Do not promise a time you have not tested.
- A log. Every after-hours call gets a line: time, address, what the caller said, the call type from the table, who was called and when.
Tell callers the after-hours price before anyone is sent
Before a technician goes out, say the after-hours rate or trip charge and what it covers, and ask the caller for a yes. Write the yes on the job. Say what the charge does not cover, such as parts or a repair quoted on site, so the caller is not surprised at the door.
The disclosure is also your protection. A caller who hears the rate first is less likely to dispute the bill later. If your after-hours rate is higher than your day rate, say so in the same sentence.
A sample triage script
Use this as a starting point. Replace the brackets with your details. Give the assistant only the lines you have approved, and keep the safety lines word for word.
[Greeting] Thank you for calling [Company name]. I am an AI assistant. I can help you now, or take a message for our on-call team. You can ask for a person at any time.
1. Is anyone in danger right now? Do you smell gas, or has a carbon monoxide alarm gone off, or does anyone have a headache, dizziness, vomiting or confusion?
If gas: "Please go outside now. Do not touch light switches, doorbells, phones or anything that could spark. From outside, call [gas utility] at [utility emergency number] or 911. Do not assume someone else has called."
If carbon monoxide alarm or symptoms: "Please get everyone outside into fresh air now, then call 911."
Do not keep a caller who is still inside on the line to collect details. Add: "When you are outside and safe, call us back and we will tell our on-call team." If the caller is already outside, go to step 4 for the address and callback number. Log the call either way. Do not book a visit.
2. Is water or sewage coming into the home, is there an active leak, or is there no heat in cold weather or no cooling in a heat wave?
If yes, ask: "Is there an infant, an older adult, or anyone with a medical condition that makes the cold or heat dangerous?"
If yes to the vulnerable person: mark the call urgent and go to step 3.
If no: go to step 3 and mark the call for the on-call technician.
3. Describe what is happening, in your own words.
Then: "Our after-hours rate for a call-out is [rate you set]. It covers [what you set]. Parts and any repair quoted on site are extra. Would you like us to send a technician now?"
If the caller says yes: take the yes and go to step 4.
If the caller says no: "We can book the next business morning. What time works for you?" Go to step 4.
4. Take the name, the address, the callback number and a one-line summary.
Read it back.
5. Close: "I have passed this to our on-call team. [Time you set] is when they will call you back. If you want a person before then, I can [transfer or alert, depending on your phone setup, as agreed in your written scope], or you can leave a message."
If the caller asks for a person at any point, follow the transfer or alert rule in your written scope. Do not say the assistant is a person.The assistant should never diagnose a gas, carbon monoxide or electrical problem, promise a time or a price you have not set, or say it is a human.
Booking the calls that can wait
Calls in the last row of the table can go straight into the calendar. Offer the slots you have approved for the next business morning, and send the booking to the system your team already uses. Field-service tools such as Jobber and Housecall Pro can hold the job and the callback. We connect the tool you already use, or help you choose one. If you want a phone line that answers for you at night and books the next visit, PhoneAnswer is our self-serve AI receptionist, and CallReply is our done-for-you AI phone agent. Each is a separate choice and an optional step.
Who this is for, and who can skip it
A company that runs an on-call rotation of several people, takes calls on the weekend and loses work when the phone goes to voicemail will get the most from a written triage list. A one-person shop that answers its own phone at night may only need a voicemail greeting that gives the gas instruction first, and a sentence that says when the next visit is. Start there, and add the rest when the call log shows a need.
For pricing of the setup and monthly plans, see AI assistant pricing. To see how an assistant would handle your calls, ask for a free demo. The home services AI receptionist page covers HVAC, plumbing, roofing and electrical work in more detail.
Published . Updated .