Coates Heater 1/2" Flow Switch, Q-12DS50, 23000105 In stock$8199
Coates Heater 1/2" Flow Switch, Q-12DS50, 23000105
$8199
FREE Delivery
Typically ships within 0 days This item ships directly from the manufacturer.
In stock
30 day returns · Easy, with prepaid labels provided
Quick overview
- Coates part 23000105 The factory flow switch ordered by manufacturer part number.
- Model Q-12DS50 The half inch flow switch used on Coates heaters.
- Half inch connection A 1/2 in flow switch, so it goes into the port it was sized for.
- A safety device The flow switch is what tells the heater there is water moving through it. Without that proof the heater should not fire at all.
- Common no heat cause A heater that will not start when everything else looks right often has a failed or stuck flow switch.
- Never bypass it Jumping a flow switch to get heat lets the heater run dry, which is how heat exchangers get destroyed.
Need a hand?
Bilingual support from pool professionals.
Frequently bought together
Current item
Coates Heater
1/2" Flow Switch, Q-12DS50, 23000105
$8199
Subtotal
Similar products
Other products people compare with this one.
Raypak Water Pressure Switch for Model 5100, 6100, 5100ti Pool Heater, H000025$4899
Raypak Switch Decal Membrane Kit For Model 268A, 408A Pool Heater, 013492F$6699
Raypak Genuine OEM Heater Pressure Switch, 062237B$6599
Coates Heater 5.5kW Element 240V for 6ILS Heater | 20005155$9299
Jandy Igniter Kit for JXi Heater Models 200/260/400, R0457502$6299
Raypak Genuine OEM Direct Mount Pressure Switch, 1.75 psi, 006737F$5299
Jandy Pressure Switch with Siphon Loop Kit for Model 200/260/400 JXi Heaters, R0457001$5899
Hayward Blower Vacuum Switch, FDXLBVS1930$4999
Raypak Genuine OEM Transformer for Model 185A, 265A, 335A, 405A Pool Heater, 120/240/24 V, 006736F$7599
Pentair MasterTemp Water Pressure Switch, 42001-0060S$9699
Sta-Rite Thermistor for Max-E-Therm and MasterTemp Heater Electrical System, 42001-0053S$9399
Raypak E3T Flow Sensor, 017155F$5099
Sta-Rite Adapter Plate Gasket Kit for Max-E-Therm and MasterTemp Heater Burner System, 77707-0011$7799
Raypak Flow Sensor Kit Assembly, 017156F$4799
Pentair ETI 400 Gas Shut Off Switch 150F Replacement Kit, 475985$6399
Hayward Air Pressure Switch, Low NOx, After 09/04, IDXL2VPS1930$9899
Sta-Rite Max-E-Therm and MasterTemp High Limit Switch, 42001-0063S$7299
Sta-Rite Max-E-Therm Automatic Gas Shut Off Switch, 42002-0025S$6199
Raypak H000078 Low Pressure Switch for 2350, 3350, 4350, 5350, 6350 and 8350 Heat Pumps$6799
Pentair Air Orifice Kit for Model 250 BTU Heater, 460745$6299
Product details
The Coates 23000105 is the half inch flow switch, model Q-12DS50, used on Coates pool heaters.
Why the heater needs it
A flow switch is a safety interlock. It closes only when water is genuinely moving through the heater, and the control uses that as a condition of firing. That single signal is what stops the heater from putting heat into water that is not going anywhere.
When it is the fault
A heater that refuses to start with a running pump, a clean filter and open valves is a classic failed flow switch. The switch either sticks open, so the heater never sees flow, or the paddle and contacts wear until they no longer make reliably.
One thing not to do
Do not jumper the switch to force the heater on. That takes away the only thing preventing the heater from running dry, and a heat exchanger fired without flow does not survive long.
| Brand | Coates |
|---|---|
| Manufacturer part number | 23000105 |
| Model | Q-12DS50 |
| Type | Flow switch |
| Size | 1/2" |
| Application | Pool heater |
| Shipping weight | 0.1 lb |
| Ships | Parcel |
Request a quote
Need a volume price, a freight quote, or pricing in writing before you order? We reply the same business day.
Customer reviews
Verified store reviews
SHOPPER APPROVED
See all reviews →
More from Coates Heater
Coates 11kW 240V Spa Heater, Single Phase, 12411ST$96999
Coates PHS Series Electric Heater 3 Phase 54kW 480V, 34854PHS-4$3,57599
Coates PHS Series Electric Heater 3-Phase 36kW 480V, 34836PHS-3$3,00999
Coates CE Series Electric Heater, 3-Phase, 15kW, 208V, 32015CE$2,07899
Coates 6ILS In-Line Electric Spa Heater, 1 Phase 240 V 6 kW$51299
Coates CPH Series Electric Heater 1 PH 24kW 240V, 12424CPH$2,95199
Coates Electric Heater 5.5kW 240V Threaded Element with Gasket, 20005061$6899
Coates High Temperature Limit Switch, 22003820$9399
Coates 5.5 kW ST Series Electric Spa Heater, 240V, 12406ST$88799
Coates Heater Element 12 kW 240V, 20006009$32999
Coates Split Nut Union for SHA and SHB Heaters, PVC, 1-1/2 to 2 inch, 32705010$1999
Coates Temperature Control Thermostat TD103-77 CPH/PHS, 22002001$6499
Coates Electric Pool and Spa Heater 24kW 208V Three Phase, 32024CPH$2,88999
Coates Electric Heater 57kW Three Phase 480V, 32857PHS$3,86399
Coates CPH Series Electric Heater 1 Phase 30kW 240V, 12430CPH$2,98799
Coates 15kW Heater Element, 208V with 4 Bolt Flange and Gasket, 20006004$32399
Questions and answers
What people ask about this product, answered by our pool techs.
What is the model number?
Q-12DS50. The Coates part number is 23000105.
What does a flow switch do?
It confirms that water is actually moving through the heater. The heater uses that signal as a condition of firing, so it cannot heat a static column of water.
My heater will not fire. Could this be it?
It is a common cause. If the pump is running and the filter is clean but the heater never starts, a stuck or failed flow switch is one of the first parts to test.
Can I just bypass the switch to get heat?
No. Bypassing it removes the protection that stops the heater running without flow, and running dry is what destroys a heat exchanger.
Web Price
Some manufacturers don’t allow us to publicly display their best prices online. When you request an Unadvertised Deal, you’re asking us to unlock a special offer that isn’t shown on the site.
Get your unadvertised price ›
Get your unadvertised price ›
1