Home / Services / Thermostat Relocation
Controls · RelocateThermostat Relocation
Thermostat relocation moves the thermostat to a spot that reads the temperature the household feels: an interior wall, about 1.5 m off the floor, in a room people use, out of the sun and away from registers. Move it when the reading on the wall differs from the rest of the floor by more than a degree or two for a reason the wall explains. Where the wall is fine and one room is the problem, a remote sensor is the cheaper fix.
A thermostat runs the whole house from one point on one wall, so a bad point skews every room. Direct sun through a window makes it read high and shut the heat off early on bright winter afternoons. Above a supply register it satisfies in minutes and short-cycles the furnace; near the kitchen it reads the oven; on an exterior wall it reads the cold masonry behind it and overheats the house. In a hallway with no return air it sits in still air that lags the rooms.
Houses end up this way for ordinary reasons. In many 1970s–90s subdivision homes the thermostat went on the nearest convenient wall above the furnace, often the front hall, where the door lets January in every time it opens. Renovations create the rest: a wall comes down for an open kitchen and the thermostat lands beside the range, or a new south-facing window puts afternoon sun on it. An addition can leave it controlling from a room nobody sits in.
There are two ways to fix it. Relocating means fishing new 18-gauge low-voltage cable from the furnace to the new wall, usually up from the basement through an interior partition, and it is the right answer when the thermostat itself sits in sun, in a draught or over a register. A wireless remote sensor leaves the thermostat where it is and lets it control from, or average with, a reading taken in the room that matters. Sensors suit the cold bedroom or the home office; they do not rescue a thermostat that cannot be told to ignore its own sensor.
The old location needs finishing, not a blank plate. The cable is pulled back or capped, and the hole is patched and left ready for paint. At both locations the opening where the cable enters the wall is sealed with putty or foam, because an open hole lets air from the wall cavity blow onto the sensor from behind. That draught is a common reason a thermostat reads the wrong temperature, and sometimes sealing it is the whole repair.
Move the thermostat when
- Afternoon sun lands on it and the heat cuts out while the north rooms are still cold
- It sits above or beside a supply register, or on a wall with a warm duct running behind it
- It is on an exterior wall or beside the front door
- Cooking drives the air conditioning on in summer or holds the heat off in winter
- A renovation left it behind a door, in a dead-end hallway or in a room nobody uses
How it works
We compare the thermostat with a thermometer at the same height in the middle of the floor, then check for sun, registers, appliances and a draught through the cable hole. If sealing the hole or adding a sensor solves it, that is what we recommend.
The new spot is an interior wall near a return grille, clear of lamps, televisions and doors, and reachable with cable from the furnace. The quote names the route and every drywall opening it needs; ask for one here.
New cable is pulled with spare conductors, the plate is mounted level, both wall openings are sealed and the old hole is patched. At the furnace the wires are landed on the control board, then heating, cooling and fan are each run from the new location.
Common questions
Where is the best place for a thermostat?
On an interior wall in the most-used living area of the main floor, about 1.5 m above the floor, with air moving past it and a return grille nearby. Keep it out of direct sun, away from supply registers, lamps, televisions and the kitchen, and off exterior walls. In a two-storey house the main floor is usual; the upstairs is then handled by balancing or a sensor.
Can a remote sensor replace moving the thermostat?
Sometimes. If the thermostat's own location is sound and one room runs cold or hot, a sensor in that room lets the thermostat average the two or follow the room at set hours. If the thermostat is in sun or over a register, a sensor only helps on models that can ignore the built-in reading. Uneven rooms can also be an airflow fault: see improving airflow to one room.
How far can a thermostat be moved?
As far as cable can be fished. Thermostat circuits carry 24 volts at low current, so run length inside a house is not the limit; access is. A move along the same wall or to the other side of a partition is simple. Crossing a finished ceiling, an exterior wall or going to another floor takes more openings, and that is what the quote reflects.
Will you add a C wire during the move?
Yes, and it is the time to do it. A relocation already means new cable, so we pull one with spare conductors and land a common wire at the control board, which sets the house up for any Wi-Fi model later. The details are on the C-wire installation page, and the thermostat itself is covered under smart thermostat installation.
Can a baseboard heater thermostat be relocated?
Not by us. Baseboard thermostats switch 120 or 240 volts directly, so moving one means extending a power circuit inside the wall, which is work for a licensed electrical contractor under ESA rules. We relocate 24-volt thermostats for furnaces, heat pumps, air handlers and boilers, and wired or wireless sensors that belong to them.