Model # PT6

Internet #100098472

Store SKU #144967

Master Flow Manually Adjustable Thermostat for Power Vent
0050206000687

Master Flow

Manually Adjustable Thermostat for Power Vent

  • Adjustable Power Thermostat
  • Suitable for all Master Flow Brand Single-Speed Power Vents
  • Pre-wired for installation
$26.50 /each

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Product Overview

Compatible with all single speed Master Flow power vents and fully adjustable for all climate conditions. Activated by temperature, helping power vents reduce damaging moisture. UL Listed and wired for easy installation.

  • Compatible with all single speed Master Flow and LL Building Products power vents
  • Thermostat temperature ranges can be manually set from 60 degrees to 120 degrees
  • Helps power ventilator reduce damaging attic heat & moisture
  • Adjustable thermostat powers your fan on/off automatically
  • Wired for easy installation
  • UL listed

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Customer Questions & Answers

12 Questions22 Answers

Customer Questions & Answers

Manually Adjustable Thermostat for Power Vent
Manually Adjustable Thermostat for Power Vent

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4 answers

If i set this to 80 degrees-does this mean my vent fan runs till it get 80 in my garage? The one I have now (which is new) runs when set at 80 and

This question is from Manually Adjustable Thermostat for Power Vent
Asked by
Hamptonville, NC
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July 30, 2015
cuts off as the temperature rises- which seems backwards to me.
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Answers (4)

Asked by
Sacramento
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Home Improvement Profile: DIYer
October 10, 2015
Answer: 
If you set it to 80 degrees the fan should turn on when it warms to 80 and remain on until it drops below 80. If your unit is doing opposite I would check and see if it is wired correctly. I have 3 of them and have never experienced that issue. Try setting it to 90 and see if that helps. Maybe 80 isn't "extreme" enough for it.
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August 3, 2015
Answer: 
Thank you for contacting MasterFlow ... Our thermostats are designed to operate until they reach a set temperature. If you set your desired setting to 105 degrees F (recommended), the fan will operate until the temperature in your attic is 5-7 degrees below the device setting (98-100) before shutting off. If the temperature is set to low (70-80 degrees) it may never turn off depending on the outside Read More
Thank you for contacting MasterFlow ... Our thermostats are designed to operate until they reach a set temperature. If you set your desired setting to 105 degrees F (recommended), the fan will operate until the temperature in your attic is 5-7 degrees below the device setting (98-100) before shutting off. If the temperature is set to low (70-80 degrees) it may never turn off depending on the outside temperature being pulled into the attic. If the air temperature is 75 to 80 degrees during the summer months, the lower setting may not be achieved and the fan will continue to operate. Attics are designed to sustain temps below 120 degrees without any degradation to the shingles or structure. Please call our Technical Services Group at 800-211-9612 to ask any additional questions. Read Less
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Asked by
Burke, VA, USA
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Home Improvement Profile: Professional
August 1, 2015
Answer: 
This specific temp switch is normally open. Which means that the temperature has to get above 80 degrees before it will close the circuit and turn on your fan. Once the temp gets back down to below 80 degrees, it should turn off your fan.
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Asked by
Cambridge, MA, USA
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Home Improvement Profile: Professional
August 1, 2015
Answer: 
If you set it at 80 degrees, the fan will turn on when the temperature rises to 80 degrees to prevent it from getting hotter. I installed one of these thermostats in conjunction with an exhaust fan in a cathedral ceiling apartment to reduce need for a.c.. It keeps the high ceiling temperature no higher than 80 degrees by venting the hot air to the roof, which reduces the load on the central a.c. in Read More
If you set it at 80 degrees, the fan will turn on when the temperature rises to 80 degrees to prevent it from getting hotter. I installed one of these thermostats in conjunction with an exhaust fan in a cathedral ceiling apartment to reduce need for a.c.. It keeps the high ceiling temperature no higher than 80 degrees by venting the hot air to the roof, which reduces the load on the central a.c. in summer, keeping the a.c. operating costs lower. Read Less
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3 answers

I would like to hook 3 small attic roof vent fans to one of these PT6 thermostats. Each fan's running amps is 1.35 amps

This question is from Manually Adjustable Thermostat for Power Vent
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May 22, 2016
at 120 volts, The motors are capacitor start type.. Is this OK?
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Asked by
Plymouth, MI
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Home Improvement Profile: Other
August 1, 2016
Answer: 
If you wanted to use a single one of these to run multiple fans you would want it to drive a 120v contactor(relay) to operate the fans system.
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May 24, 2016
Answer: 
No, the PT6 Thermostat is designed and rated to operate one device per thermostat. Please call Technical Services at 800-211-9612 with any additional questions.
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Asked by
Burke, VA, USA
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Home Improvement Profile: Professional
May 23, 2016
Answer: 
Yes, this switch would easily work for your application. This temperature switch is rated for 15 amps @ 120v. If your fans are only 1.35 amps each, you would be well below the maximum amp rating for this temp switch.
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3 answers

Would thermostat work on a solar attic fan or does it need 120 VAC?

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Asked by
Califiornia
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February 9, 2016
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Asked by
Washington Co, TN
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March 17, 2016
Answer: 
Yes, it will work on AC o DC. A thermostat like this is merely a set of contacts that close due to a bi-metalic disc moving with to the amount of heat it gets, based on your setting. The contacts don't care if it has AC or DC connected to them, as long as you don't exceed the amperage rating on those contacts.
That is 15amps on this thermostat.
LOW voltage DC does often raise the amps Read More
Yes, it will work on AC o DC. A thermostat like this is merely a set of contacts that close due to a bi-metalic disc moving with to the amount of heat it gets, based on your setting. The contacts don't care if it has AC or DC connected to them, as long as you don't exceed the amperage rating on those contacts.
That is 15amps on this thermostat.
LOW voltage DC does often raise the amps significantly over 120vAC, so be sure you don't go over 15amp. Read Less
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February 12, 2016
Answer: 
The thermostat is for AC powered units only.
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February 11, 2016
Answer: 
The PT6 thermostat is for AC powered units only. Solar units are DC powered. Look for the model# SLRHT1 which is designed for the MasterFlow Solar Powered roof or gable fans. Please call MasterFlow Technical Services at 800-211-9612, 8A-5P M-F ET, with any additional help needed.
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2 answers

Can I use a fan t-stat for a small fan?

This question is from Manually Adjustable Thermostat for Power Vent
Asked by
Houston, Texas
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June 26, 2016
I built have a small home theater for which an equipment rack sits in an alcove I built in the adjoining hallway. Next to it is a beverage cooler. Both are in cabinets built of 3/4" plywood that I set in a wall that backs up into the attic. Both re putting out a lot of heat. There are two small fan built into the equipment rack but it is still hot -- and some of that heat is leaking into the hall. (I am in Houston, TX, the Steam Room of the Southwest!)

I am considering buying two small bath fans (50 CFM)and attaching them to backs (attic side) of the two cabinets with ducts then venting the heat through the roof. Can I use the MasterFlow PT6, which is marketed for use with a much larger attic power vent, so so the fans will shut off on a cooler night or whenever the weather finally cools down?
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Answers (2)

July 6, 2016
Answer: 
The PT6 thermostat is recommended for attic fans only. Please call MasterFlow Technical Services at 800-211-9612, M-F 8A-5P EDT, for any additional questions.
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Asked by
Burke, VA, USA
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Home Improvement Profile: Professional
June 27, 2016
Answer: 
Yes, this temp switch is designed for attic type locations with ambient temps like u would find in attics. As long as you dont exceed the wattage rating of the switch, you should have no problems with the application you described.
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Customer Reviews

Rated 4.4 out of 5 by 32 reviewers.
Rated 5.0 out of 5.0 by Simple Thermostat Very simple to wire and set. Remove the old one and replaced it with a new one in about 20mins. September 20, 2016
Rated 4.0 out of 5.0 by good local mount thermostat I purchased this to control an attic fan as I needed the thermostat co-located with the fan to evacuate heat. It works well and is very easy to install and use as the markings for the temp setting are very clear and easy to read. August 16, 2016
Rated 5.0 out of 5.0 by great product hard to locate in home depot store installed it for a ceiling fan in garage. works super! keep the heat off the ceiling & on the floor where you want it in the winter in Maine. September 13, 2016
Rated 4.0 out of 5.0 by Adequate Bought this to go with replacement motor. Seems cheap but it was exactly like the original. Came set on 105* and that seems to be close. I tried to test the thermostat in use with a thermometer but soon tired of that. After installing I walked up to attic and the motor was running. The thermometer read 113*. Later returned to attic and ventilator was still running, temperature was 90*. As I turned to leave ventilator stopped running. Generally, the ventilator kicks on in the morning around 10-11 o'clock and off about the time the roof is shaded, 7 o'clock or so. Physically feels about right, the attic is cooler. June 17, 2016
Rated 2.0 out of 5.0 by Worked for 3 years, then stopped turning the fan on. It won't actuate at all. Put it in my attic to control a fan. Worked great for 3 years. Now, it won't turn on. I'll look for another brand this time. Also, I found that I didn't like the need to use a screwdriver to change the temp. A couple of times, I wanted to change the temp and I had to go down a find a screwdriver. July 25, 2016
Rated 4.0 out of 5.0 by Easy to install, with all appropriate parts. Easy to install. came with all the parts necessary to install. July 5, 2016
Rated 5.0 out of 5.0 by It is exactly what we needed Although a little loud it works just the way it needs to. May 10, 2016
Rated 1.0 out of 5.0 by Part-Time Adjustable Thermostat I have replaced three of these thermostats on my powered attic fan. One of them stuck and finally burned out the fan motor when i was working out of town and it ran the fan continually for a month straight. They seem to work OK for a while but soon I have to cut it off at the shut-off switch when it sticks. i have tried different adjustments time & time again but they do not perform flawlessly so I can trust it. I am looking for a digital thermostat to replace it. It might be more dependable ? July 7, 2015
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