Emergency Boiler Repair in Exeter: No Heating or Hot Water, What to Check First and What a Call-Out Costs
Boilers fail when they are working hardest. Around 60% of all breakdown calls in Exeter come between late October and February, and the first cold snap of the year, usually the second week of November, is the busiest few days heating engineers see. The city has around 55,000 households, the large majority on mains gas, and a boiler over ten years old, which is roughly a third of them, is three times more likely to fail than one under five. An emergency boiler repair in Exeter costs £90 to £180 for the call-out and first hour in 2026, rising to £150 to £280 out of hours, before parts. But about a third of the "emergencies" we attend are fixed by the homeowner in five minutes once they know what to look at. Here is what to check before you pick up the phone, what counts as a real emergency, and what you will pay when it is one.
The Five-Minute Checks Before You Call Anyone
Most boilers that stop have not broken. They have locked out. Start here.
Check the pressure gauge on the front of the boiler. On a combi or system boiler it should sit between 1 and 1.5 bar when cold. If it is below 0.5, the boiler will not fire, and topping it up using the filling loop underneath takes two minutes. Your manual, or the sticker inside the boiler's front panel, shows how. This one issue accounts for roughly one in five winter call-outs in Exeter.
Look at the display for a fault code. Write it down. Then check the thermostat is calling for heat, the programmer is not stuck in a holiday mode, and the prepayment meter, if you have one, has credit. Check the gas is on by trying the hob. Finally, if it is below freezing outside and the boiler shows a code for the condensate, the white plastic pipe running outside has frozen. Pouring warm, not boiling, water over it and resetting the boiler fixes it. That single fault jams every heating engineer's phone in Exeter on the first frosty morning of the year.
If none of that works, or the same code keeps coming back, it is an engineer's job. Green Home Boilers & Heat Pumps covers Exeter and the surrounding towns for same-day breakdown repairs, and it helps enormously if you have the fault code and the boiler make ready when you ring.
What Counts as a Genuine Emergency
Not every cold house is an emergency, and paying an out-of-hours rate for something that can wait until 8am is throwing money away. Three situations should never wait.
A smell of gas. Turn off the supply at the meter, open windows, do not touch light switches, and call the National Gas Emergency line on 0800 111 999 before anyone else. A boiler that is making a banging or kettling noise and showing scorch marks, soot, or a lazy yellow flame is a carbon monoxide risk, and the HSE's guidance on gas safety in the home is clear that the appliance should be switched off and not used until a registered engineer has checked it. Water pouring from the boiler, rather than a drip, is the third, because it will bring the ceiling down if it is upstairs.
A house with no heating in January and a vulnerable person in it, a baby, someone elderly, or someone with a health condition, is an emergency for a different reason and most engineers will prioritise it. A house with hot water but no heating, or heating but no hot water, in October, is not, and a next-day slot at standard rates is the sensible choice.
Repairs Under Warranty
If the boiler is under ten years old, check the warranty before calling an independent engineer. A manufacturer's warranty often covers parts and labour, but only if the boiler has been serviced every year by a registered engineer with the paperwork to prove it. We set out exactly what breaks that cover in our guide to boiler warranties in Devon and what voids them. Calling an independent engineer to open the case can itself void the warranty on some brands, so it is worth a call to the manufacturer's helpline first, even if their response time is slower.
What an Emergency Boiler Repair Costs in Exeter in 2026
The call-out and diagnosis is the fixed part. The parts are the variable.
- Standard weekday call-out including the first hour: £90 to £180
- Evening, weekend or bank holiday call-out: £150 to £280
- Each additional hour of labour: £60 to £95
- Diverter valve replacement on a combi: £250 to £450 fitted
- Printed circuit board (PCB): £300 to £550 fitted
- Fan or pump replacement: £220 to £400 fitted
- Heat exchanger: £450 to £900 fitted, and often the point where replacement makes more sense
- Gas valve: £250 to £400 fitted
Parts availability sets the timescale more than anything. Common brands such as Worcester Bosch, Vaillant and Ideal have parts in stock at merchants in Marsh Barton, so a repair is usually done on the day or the next morning. An older or less common boiler can wait three to five working days for a part, which in a cold house is the real cost. Exeter has a good supply of Gas Safe engineers, but the pool who will take same-day breakdowns in the winter peak is smaller and gets booked out fast, which is why the first cold week of November is such a mess every year.
When a Repair Is Money Down the Drain
The rule most engineers use is simple: if the boiler is over twelve years old and the repair is more than a third of the cost of a new one, replace it. A new combi in Exeter fitted costs £2,000 to £3,200 in 2026, so a £600 heat exchanger on a fifteen-year-old boiler is a bad bet. It will likely need another £300 part within eighteen months, and it is running at 70% to 80% efficiency against 92% or more for a new A-rated model, which on a typical Exeter gas bill of £900 to £1,200 a year is £120 to £200 a year in wasted gas.
The exception is a boiler that has been well serviced and has one clear fault. A ten-year-old Vaillant with a failed diverter valve is worth £350 to fix. A fourteen-year-old boiler with a leaking heat exchanger and a noisy fan is not. Which? publishes reliability data by boiler brand that gives a useful steer on whether your particular make tends to age well.
Emergency Repair or Straight to a Heat Pump?
A breakdown is the worst time to make a long-term heating decision, but it is when most people make it. If the boiler is old and the house is reasonably well insulated, a heat pump is a realistic replacement, and the Boiler Upgrade Scheme still offers £7,500 towards one for eligible homes in England. The catch is lead time. A heat pump installation needs a heat loss survey, possibly a radiator upgrade, and DNO approval, and that takes four to ten weeks. Nobody is doing that in a cold house in December.
The practical route is a temporary repair to get through the winter, or in a bad case a short-term boiler replacement, then a heat pump conversation in spring when there is time to do it properly. Engineers who do both boilers and heat pumps can tell you honestly which makes sense for the house, rather than defaulting to what they sell.
Avoiding the Next One
A boiler serviced every September, before the heating season, is far less likely to fail in January. A service in Exeter costs £80 to £120 and catches the worn fan bearings, the weak expansion vessel and the corroded electrode that become emergencies six weeks later. Bleeding radiators in October, insulating the condensate pipe before the first frost, and keeping the pressure at 1 to 1.5 bar covers most of the rest.
None of it is complicated. It is just that nobody thinks about the boiler until the morning it is quiet and the house is cold.
Frequently Asked Questions
How much does an emergency boiler repair cost in Exeter?
A standard weekday call-out including the first hour costs £90 to £180 in 2026. Evening, weekend and bank holiday call-outs are £150 to £280. Parts are on top, with common repairs such as a diverter valve at £250 to £450 fitted and a PCB at £300 to £550.
What should I check before calling a boiler engineer?
Check the pressure gauge is between 1 and 1.5 bar, note any fault code on the display, confirm the thermostat and programmer are calling for heat, check the gas supply at the hob, and in freezing weather check whether the condensate pipe outside has frozen. These checks resolve about a third of winter call-outs without an engineer.
Is no hot water an emergency?
Usually not on its own, unless someone in the house is vulnerable. A next-day appointment at standard rates is the sensible choice. A smell of gas, signs of carbon monoxide such as soot or a yellow flame, or water pouring from the boiler are genuine emergencies.
Should I repair or replace an old boiler that has broken down?
If the boiler is over twelve years old and the repair costs more than a third of a new boiler, replace it. A new combi fitted in Exeter costs £2,000 to £3,200, and the efficiency gain alone saves £120 to £200 a year on a typical gas bill.
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