Swapping a cooker looks like a delivery job right up until you look behind it. The fuel type, the connection already sitting in the wall and the exact size of the gap decide whether a new appliance goes straight in or whether something has to change first. Getting those three things straight before you order avoids the most common delay of all: a new cooker standing in its box for a fortnight while the supply behind the units is sorted out.
Derek Stuart Heating & Gas carries out cooker installation alongside fire installation, boiler installation, boiler repairs and boiler servicing. What follows is what a heating engineer needs to know before the visit, and what is worth checking yourself first.
Start with the fuel type and the existing connection
The first question is whether you are replacing like for like. A gas cooker going in where a gas cooker came out is usually the simplest case, because the supply point already exists and the work is a disconnect, reposition and reconnect. A gas cooker replacing an electric one is a different job entirely: there may be no gas supply in that part of the kitchen at all, and bringing one across is separate work that needs planning and pricing before any appliance is ordered.
Gas connections are not a DIY item. Work on a gas appliance connection has to be carried out by an engineer on the Gas Safe Register, and that applies to a simple cooker swap exactly as it applies to a boiler. Electric models have their own catch: a freestanding electric cooker above a certain rating normally needs its own dedicated circuit and cooker switch rather than a standard plug socket, so an electric-for-electric swap is not automatically a straight swap either.
- the fuel type of both the old appliance and the new one
- whether the existing point is a bayonet fitting or a rigid connection
- whether an electric model needs a dedicated circuit and cooker switch
- the length and position of the existing supply hose or cable
- whether the cooker sits against an outside wall or an internal one
Measure the gap, not the cooker
Measurements decide the rest of the cooker installation. Gosforth kitchens vary enormously in age and layout, and appliance listings quote a nominal width that real gaps rarely match. Measure the aperture at the back as well as the front, because base units bow inward over the years. Check the height against the worktop with the adjustable feet at their lowest setting, and check the depth against the worktop overhang so the control panel is not pushed proud of the units.
Then measure the route in. A range cooker that fits the gap to the millimetre is no use if it will not clear the back door, turn the corner at the bottom of the stairs or pass a narrow doorframe. It is also worth noting where the supply point sits: if it is directly behind the appliance, there has to be room for the connection without kinking or straining the hose once the cooker is pushed back.
What actually happens on the day
A straightforward swap follows a predictable order. The supply is isolated, the old appliance is disconnected and drawn out, the new one is positioned, connected and levelled, and then it is tested. Testing is the part most people never see and the part that matters most: the connection is checked for tightness, the appliance is checked for correct operation, and any ventilation requirement for the room is confirmed.
Levelling is worth paying attention to. A cooker sitting even slightly out of level will cook unevenly, and on a lot of models the oven door will not close squarely. On a freestanding appliance, ask for the anti-tip bracket or stability chain to be fitted — it is a small job that is easy to skip and it is there for a reason.
- clear the worktops and the floor either side of the gap
- empty the old oven and take out the shelves and trays
- make sure the isolation point can actually be reached
- keep the new appliance instructions to hand
- have the make and model number written down
Questions customers ask
Can I connect a new gas cooker myself if the fitting is already there?
No. Even where a bayonet fitting is already in place and the hose appears to push straight on, connecting a gas appliance is work that has to be done by a Gas Safe registered engineer. A push-fit connection can look and feel secure while still not being sound, and there is no way for a householder to test it. The same applies in reverse: an old supply point that is no longer being used needs capping off properly rather than being left open behind a unit.
What should I have ready when I book a cooker installation?
The make and model number of the new appliance, its fuel type, the width of the gap it is going into and a note of what is there at the moment. If you are switching between gas and electric in either direction, say so at the point of booking, because it changes what the engineer brings and how long the visit needs to be. A photograph of the existing gap and connection sent through in advance is more useful than any description.
Before you order anything, measure the gap at the back as well as the front, note the fuel type of the connection that is already there, and write down the make and model number of the appliance you are considering.
Derek Stuart Heating & Gas works as a heating engineer across Gosforth, covering cooker installation, fire installation, boiler installation, boiler repairs, boiler servicing and system cleansing or power flushing.
Call 07850 520008 with those details and you will get a straight answer on whether the cooker you have in mind is a direct swap or needs work behind it first.
