10 Best Painless Wiring Thermostats
for March 2023

MOOZ's editors independently choose recommendations. Purchases made through our links may earn us commissions.

1
9.7
SCORE
Painless Wiring 30104 Adjustable Fan Thermostat w/Relay, 1 Pack

Painless Wiring 30104 Fan Adjustable Thermostat w/Relay

by Painless Wiring
What We like

Innovative products

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Product Features

  • Skilled craftsmanship
  • Accurate and easy installation
  • High quality
2
9.6
SCORE
Painless Wiring 30111 Thermostat (on 185, off 175), 1 Pack

Painless Wiring 30111 Thermostat (on 185

by Painless Wiring
What We like

Innovative products

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Product Features

  • High quality
  • Accurate and easy installation
  • Skilled craftsmanship
3
9.5
SCORE
Painless Performance 30118 Dual Activation, Dual Electric Fan Relay Kit with Thermostatic Switch (On 205/Off 190) for LSX

Painless Performance Dual 30118 Activation

by Painless Wiring
What We like

Features simple to use Posi-taps for the ignition and A/C compressor connections

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Product Features

  • Kit includes: Three 40-amp relays with mounting bases & wiring, fuse holder & 70-amp fuse, two LT1/LS1 fan connectors, thermostatic switch, adapter and insulated terminals
  • Ideal for installing air conditioning in your project car
  • Dual activation cooling fan relay will turn your cooling fans on when the engine reaches the preset temperature of the thermostatic switch mounted in the engine head or when the A/C is turned on
  • Thermostatic switch turns on at 205 degrees and off at 190 degrees; Thread size: M12 x 1. 5mm
4
9.3
SCORE
Painless Performance 30111 Thermostatic Switch with Adapter, 185 On/175 Off

Painless Performance 30111 Switch Thermostatic with Adapter

by Painless Wiring
What We like

Switch thread size 3/8"-18NPT; 1/2" to 3/8" NPT adapter also provided

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Product Features

  • Thermostatic switch for use with fan relay kits
  • Includes wiring terminals
  • Switch specifications: 185 Degrees On/175 Degrees Off
5
8.9
SCORE
Painless Performance 30110 Thermostatic Switch (On 195/Off 185)

Painless Performance 30110 Thermostatic (On Switch 195/Off 185)

by Painless Wiring
What We like

Country of Origin : Taiwan

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Product Features

  • Thermostatic switch turns on at 195 degrees and off at 185 degrees
  • Package Weight: 0.088 pounds
  • Package Dimensions: 6.604 H x 8.128 L x 6.096 W (centimetres)
6
8.7
SCORE
Painless Performance 30129 Weatherproof Electric Fan Relay Kit with Thermostatic Switch (On 185, Off 175)

Painless Performance 30129 Weatherproof Electric Fan Kit Relay with Thermostatic Switch (On 185

by Painless Wiring
What We like

Thermostatic switch turns on at 185 degrees and off at 175 degrees; Thread size: 3/8"-18NPT; 1/2" NPT to 3/8" NPT adapter provided

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Product Features

  • Inexpensive protection for an electric fan and a vehicle's wire harness
  • Threaded thermostatic switch that screws into the engine block or intake manifold for a professional looking installation
  • Provides constant voltage, protects from voltage and amperage spikes and prevents the fan from back feeding voltage through the vehicle's wire harness
  • Kit includes weatherproof: SPST 35-amp relay, 30-amp circuit breaker and relay base with harness (6' input/2' output); thermostatic switch, adapter, heat-shrinkable crimp-on terminals and mounting hardware
7
8.3
SCORE
Painless 30113 Thermostat

Painless 30113 Thermostat

by Painless
What We like

Designed to apply a ground to an automotive style relay (on pin 85) to turn the radiator cooling fan on and off automatically based on cylinder head temperature

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Product Features

  • Threads into the stock coolant temperature sensor port on either side of a LSX cylinder head
  • Thermostatic switch turns on at 205 degrees and off at 190 degrees
  • Thread size andpitch is M12 x 1. 5mm
8
8
SCORE
Painless 30128 Waterproof Fan Relay - 200 Degree Thermostat

Painless 30128 Waterproof Fan Relay

by Painless Wiring
What We like

30128

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9
8
SCORE
Painless Performance 30106 Electric Fan Relay Kit with Thermostatic Switch for Gen III and up GM Engines (On 205/Off 190)

Painless Performance 30106 Electric Fan Relay Kit with Thermostatic Switch Gen for III and up GM Engines (On 205/Off 190)

by Painless Wiring
What We like

Provides constant voltage, protects from voltage and amperage spikes and prevents the fan from back feeding voltage through the vehicle's wire harness

more infoarrow_drop_down

Product Features

  • Kit includes: SPST 40-amp relay, 30-amp circuit breaker, thermostatic switch, relay base with harness, crimp-on terminals and mounting hardware
  • Threaded thermostatic switch screws into the engine block or intake manifold for a professional looking installation
  • Thermostatic switch turns on at 205 degrees and off at 190 degrees; Switch has 12x1. 5M thread
10
8
SCORE
Painless Wiring 30104 Adjust.El.Fan Therm.Relay

Painless Wiring Adjust.El.Fan 30104 Therm.Relay

by Painless Wiring
What We like

Designed to allow a wide range of temperature adjustments for your electric fan; Can be used to set a precise temperature desired for fan activation

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Product Features

  • Kit includes the adjustable thermostat, bracket, 40-amp relay, relay base with wiring (6' input, 3' output), a 30-amp circuit breaker, terminals and mounting hardware
  • Bulb at the top of the capillary tube is designed to probe or be attached to the top or hottest portion of the radiator; NOTE: Temperature refers to the temp of the capillary tube, not coolant temp
  • Temperature range in degrees: 32F to 248F; Accuracy in degrees: +/- 7. 3F
  • Mounting brackets are made of brushed stainless steel for great looks and durability

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