By Intermatic



Part # 178T24

Alternate Part #'s S178T24, _178T24, INT-301-1500, INT178T24

Product Description

Single Circuit Freeze Protections Controls
These Freeze Protection Controls are designed to protect the pool and spa equipment and plumbing against freeze damage. They turn ON the pump and the heater when the outdoor temperature drops below the temperature set by the user adjustable thermostat. Models without timer connect to a timing or switching device and together, they control operation of the equipment as well as protect it against freeze damage. Models with timer provide both automation and protection for the equipment. (PLEASE NOTE: Front Face Plate with degree markings not included.)

Product Specs

  • Thermostat Knob and Wiring Only (Mechanism and Relay Unit Not Included)
  • 120/240 V Installation
  • 1.5-3 HP Rating
  • 45-degrees to 32-degrees with 5 degree differential

Click here for Relay Unit

Click here for more Intermatic Timers


?     Asked on 12/24/2007by Guest

Just to be clear? The knob and wire are included but not the Face plate where it states the degree's? Thanks

A  Answered on 12/24/2007 by InyoPools Product Specialist Patrick P.

That would be correct this is just the thermostat knob and wiring coming off of the knob. The photo of the item in the picture is either the PF1102M or the PF1103M (Depending on Voltage) You may view our complete line of Intermatic PF timer parts here http://www.inyopools.com/controls_intermatic_timer_parts.aspx Thanks! 

?     Asked on 8/25/2008by Guest

Is the capillary tube part of the 178T24 thermostat?

A  Answered on 8/25/2008 by InyoPools Product Specialist Patrick P.

Yes the capillary tube does come with the 178T24 thermostat.

?     Asked on 1/24/2013by Guest

Will this 178T24 protect 2 pumps plumbed together?

A  Answered on 1/24/2013 by InyoPools Product Specialist Patrick P.

Per the manufacturer, if the pumps are plumbed together, only the filter pump needs protection.

?     Asked on 4/4/2015by Inyo Visitor

intermatic temp switch 178t24 with dual timers..is this part only available with 120v/240v installation or is it available in 120v only

A  Answered on 4/6/2015 by InyoPools Product Specialist Joe S.

this unit is only available as a 120/240 installation

?     Asked on 8/8/2016by Bob Gasaway

My timer will not cut off. I think it's because the copper probe to the thermostat is broken. I replaced the digital time clock with a new one but still have the same results. The model is PF1102T. I plan to order a new thermostat and possible product 7. suggestions?

A  Answered on 8/19/2016 by InyoPools Product Specialist Tim Q.

Bob,We recommend calling intermatic for trouble shooting on your timer. I have included Intermatic's phone number in this e-mail. It's 815-675-7000 . Thanks I hope this helps


Est. Repair Time

Less than 1 hr

Tools Needed

Screwdriver, long-nosed pliers to retrieve dropped screws

1     0

Thermostat Failed to Function

Written on 12/19/2018 by Guest

Initially looked to be a simple operation, but two screws at the rear of the assembly were hard to reach and difficult to remove and reinstall amid the mess of wiring. It just required patience and some ingenuity (and a magnetic screwdriver) to reinstall the two screws. Otherwise, it was a pretty simple task. Once installed, the new thermostat has operated flawlessly.

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