The gap in the trade

Nobody teaches heating engineers the wiring. Here is where it was supposed to happen.

In short

Gas courses teach gas. Plumbing courses teach water. Many colleges do not teach controls wiring at all, and the trade schools that do sell it as one day for £300 or more, with barely any hands-on time and nothing to practise on afterwards. Most of a day’s learning is gone within days. So plumbing and heating engineers go to work having never wired the thing that causes most of their call-backs. DrawWarm is the practice that never existed: from £29 a month, as often as you like, until it is automatic.

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What each route teaches about controls wiring

Route	What it teaches	The wiring	Cost	Afterwards
Gas courses and ACS	Gas safety, the regulations, combustion, the assessments you need to be Gas Safe registered.	None. Being Gas Safe registered does not involve wiring a heating system.	Course and assessment fees	Nothing to practise on; the wiring is met on site.
Plumbing and heating diplomas	Water, pipework, fittings, the regulations, some system types on paper.	Little or none. Many colleges do not teach controls wiring at all; where they do, it is a diagram and a rig shared by the class.	Course fees	The rig belongs to the college; there is no practice at home.
A one-day wiring course	S-Plan and Y-Plan on a training board, demonstrated, sometimes wired once by each learner.	Yes, for a day. Often £300 or more, with little hands-on time per person.	Often £300 or more for the day	Nothing. Without practice most of a day’s learning fades within days, and there is no board to go back to.
Free videos	Explanations of wiring and faults, on camera, including the DrawWarm founder’s own channel.	Watching, not doing. No way to be wrong and find out.	Free	Rewatch it. The hands still have not done it.
DrawWarm	7 courses and 45 lessons that check every connection you make; 23 call-outs with a meter.	Every day, as often as you like: wire it, switch it on, meter it, break it, fix it, until the wiring centre is automatic.	Sandbox £29 a month (the simulator only). Full version £199 a month; £99 at launch until 31 March 2027. No VAT added.	The whole point. It is the practice, and it is there on Tuesday when the fault is in front of you.

The courses are not the problem: gas courses should be about gas, and a day on a board is better than no day. The problem is that nobody owns the wiring, and a skill you do once does not stay.

Why a day does not stick

One board, twelve learners: most of the day is watching someone else wire it.
You do the S-Plan once. Once is enough to recognise it and not enough to do it under pressure with a customer stood behind you.
The board stays at the training centre. On Tuesday, with a cold cylinder and a live wiring centre, there is nothing to go back to.
Without practice, most of what is learned in a day fades within days. That is not a criticism of the course; it is how memory works.

What practising until it is automatic looks like

Wire an S-Plan from a bare wiring centre. Then a Y-Plan. Then the combi with the wireless stat. 45 lessons check every connection as you make it.
Break it on purpose: the stat on the satisfied terminal, the switched live on the permanent live, the blown 3 A fuse. 23 call-outs, chosen at random, with a meter and a clock.
Do it at 11 pm with nobody watching, get it wrong, and see exactly why. Then do it again tomorrow.
From £29 a month for the simulator on its own, £199 for every course and call-out. Cancel any time.

The short version A day course shows you. Videos explain to you. DrawWarm makes you do it, checks it, and is still there next week. Practise until you are the one the others ring.

Questions

Does a gas qualification teach heating wiring?

No. The ACS assessments and the gas courses that lead to Gas Safe registration are about gas: safety, combustion, the regulations. Wiring an S-Plan is not part of them. Most gas engineers meet the wiring centre for the first time on a customer’s system.

Do plumbing courses teach it?

Plumbing and heating diplomas are about water: pipework, fittings, the regulations, system types on paper. Some colleges include a wiring unit on a shared rig; many teach no controls wiring at all.

I did a one-day wiring course. Is that not enough?

A day shows you the circuit. It cannot make it stick, because a skill needs repetition and the board stays at the training centre. Without practice most of a day’s learning fades within days, and the day often cost £300 or more. DrawWarm is the practice after the day, or instead of it.

How much practice is there?

7 courses, 45 lessons and 5 diagnosis challenges that check every connection, 23 call-outs with a meter and a clock, and the Sandbox with all 23 components, from £29 a month. Do a lesson a night for a month and you have wired more systems than most engineers do in a year.

Is it a qualification?

No. It is practice: the wiring and fault-finding the qualifications expect you to have done many times over. It gives you a record of what you completed, with stars and scores; it does not give you a certificate that stands in for an assessment.

One to one

DrawWarm against the specific alternatives

DrawWarm vs Heat Geek
An honest comparison of DrawWarm and Heat Geek for UK heating engineers: what each teaches, how, at what price, and where each is the better choice.
DrawWarm vs a training rig
A heating controls training rig against the DrawWarm simulator: cost, one board per class against one per learner, safety, faults, evidence, and where the rig is still better..
DrawWarm vs free YouTube videos
Why pay for a heating wiring simulator when YouTube is free? An honest answer: what the videos do, what they cannot do, and what the DrawWarm founder’s own channel covers..
DrawWarm vs Interplay Learning
Interplay Learning’s US trade simulations against DrawWarm’s UK heating controls simulator: systems, wiring standards, price and who each is for..

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