Skip to accessibility statement
Free shipping on orders over $99
●
Your Zip:
43230
ORDER STATUS
Your Zip:
43230
HELP
MENU
CONTACT & SUPPORT
Live Chat Offline:
Email Us
SIGN IN
0
CART
×
SIGN IN
Shop by Category
Plumbing
Heating
HVAC
Electrical
PEX
Fittings
Valves
Tools
Resources
Our Team
Account
Order History
Returns
Customer Support
Give Us Feedback
Tools
Reorder
Quick Order
Saved Carts
Lists
Resources
PEX Plumbing
PEX Tools
Radiant Heat
Boiler Room
Plumbing Supplies
Air Conditioning
Video Library
Project Calculators
Find Parts For Your Unit
Filter menu expanded
Filters
Hide Filters
70 items
Reset
SORT
Top Sellers
Default
Price ▲
Price ▼
Product Availability
–
Show In Stock Only</strong> Filter (59)
Show
In Stock Only
(59)
Product Type
–
HVAC Control Filter (19)
HVAC Control (19)
HVAC Part Filter (46)
HVAC Part (46)
Refrigeration Control Part Filter (4)
Refrigeration Control Part (4)
Relay Filter (1)
Relay (1)
Brand
–
5-2-1 Compressor Saver Filter (3)
5-2-1 Compressor Saver (3)
Bluefin Filter (7)
Bluefin (7)
DiversiTech Filter (2)
DiversiTech (2)
Goodman-Amana Filter (1)
Goodman-Amana (1)
Lennox Filter (2)
Lennox (2)
MARS Filter (4)
MARS (4)
Ranco Filter (5)
Ranco (5)
Rectorseal Filter (3)
Rectorseal (3)
Supco Filter (34)
Supco (34)
TorQstart Filter (9)
TorQstart (9)
Voltage
–
100 to 125 VAC Filter (3)
100 to 125 VAC (3)
115-277V Filter (1)
115-277V (1)
115/288V Filter (2)
115/288V (2)
115V Filter (18)
115V (18)
120v Filter (2)
120v (2)
170v Filter (2)
170v (2)
208-265V Filter (1)
208-265V (1)
208V Filter (3)
208V (3)
220v Filter (1)
220v (1)
230V Filter (3)
230V (3)
See More
Review Score
–
5 Filter (22)
(22)
4 Filter (5)
(5)
Price Range
–
$5 to $10 Filter (4)
$5 to $10 (4)
$10 to $15 Filter (12)
$10 to $15 (12)
$15 to $20 Filter (6)
$15 to $20 (6)
$20 to $25 Filter (9)
$20 to $25 (9)
$25 to $30 Filter (6)
$25 to $30 (6)
$30 to $35 Filter (8)
$30 to $35 (8)
$35 to $40 Filter (3)
$35 to $40 (3)
$40 to $45 Filter (3)
$40 to $45 (3)
$45 to $50 Filter (5)
$45 to $50 (5)
$50 to $60 Filter (4)
$50 to $60 (4)
See More
Home
HVAC Supplies
HVAC Controls
Hard Start Devices
Hard Start Devices
70 items
FILTER
Grid
List
Sort: Top Sellers
SPP6 Compare Checkbox
Compare
Hard Start Kit w/ 500% Torque Increase (90/277V)
SKU:
SPP6
Supco
SKU:
SPP6
Brand:
Supco
(53)
–
+
$10.83
each
ADD TO CART
Add to List
In Stock
Get 1,363 by
Tue, Jun 16
Total Available: 8,460
In Stock
Get 1,363 by
Tue, Jun 16
Total Available: 8,460
Add to List
CSRU1 Compare Checkbox
Compare
Hard Start Kit for 1 to 3 Ton A/C Units
SKU:
CSRU1
5-2-1 Compressor Saver
SKU:
CSRU1
Brand:
5-2-1 Compressor Saver
(24)
–
+
$37.26
each
ADD TO CART
Add to List
In Stock
Get 662 by
Tue, Jun 16
Total Available: 2,453
In Stock
Get 662 by
Tue, Jun 16
Total Available: 2,453
Add to List
CSRU2 Compare Checkbox
Compare
Hard Start Kit for 3.5 to 5 Ton A/C Units
SKU:
CSRU2
5-2-1 Compressor Saver
SKU:
CSRU2
Brand:
5-2-1 Compressor Saver
(13)
–
+
$45.75
each
ADD TO CART
Add to List
In Stock
Get 794 by
Tue, Jun 16
Total Available: 2,135
In Stock
Get 794 by
Tue, Jun 16
Total Available: 2,135
Add to List
RCO410 Compare Checkbox
Compare
3-in-1 Hard Start Kit for Refrigerators - 115v (1/3 - 1/4 HP)
SKU:
RCO410
Supco
SKU:
RCO410
Brand:
Supco
(14)
–
+
$12.51
each
ADD TO CART
Add to List
In Stock
Get 245 by
Tue, Jun 16
Total Available: 794
In Stock
Get 245 by
Tue, Jun 16
Total Available: 794
Add to List
RCO210 Compare Checkbox
Compare
Solid-State Hard Start Relay, Overload & Start Capacitor 1/3-1/2 HP, 13.3A RLA (115V)
SKU:
RCO210
Supco
SKU:
RCO210
Brand:
Supco
(6)
–
+
$20.94
each
ADD TO CART
Add to List
In Stock
Get 238 by
Tue, Jun 16
Total Available: 655
In Stock
Get 238 by
Tue, Jun 16
Total Available: 655
Add to List
SPP8E Compare Checkbox
Compare
E Series Hard Start Kit
SKU:
SPP8E
Supco
SKU:
SPP8E
Brand:
Supco
(4)
–
+
$33.75
each
ADD TO CART
Add to List
In Stock
Get 242 by
Tue, Jun 16
Total Available: 1,117
In Stock
Get 242 by
Tue, Jun 16
Total Available: 1,117
Add to List
CSRU3 Compare Checkbox
Compare
Hard Start Kit for 4 to 5 Ton A/C Units
SKU:
CSRU3
5-2-1 Compressor Saver
SKU:
CSRU3
Brand:
5-2-1 Compressor Saver
(12)
–
+
$53.01
each
ADD TO CART
Add to List
In Stock
Get 150 by
Tue, Jun 16
Total Available: 900
In Stock
Get 150 by
Tue, Jun 16
Total Available: 900
Add to List
SPP5 Compare Checkbox
Compare
Hard Start Kit w/ 300% Torque Increase (90/277V)
SKU:
SPP5
Supco
SKU:
SPP5
Brand:
Supco
(4)
–
+
$11.62
each
ADD TO CART
Add to List
In Stock
Get 559 by
Tue, Jun 16
Total Available: 1,344
In Stock
Get 559 by
Tue, Jun 16
Total Available: 1,344
Add to List
96506 Compare Checkbox
Compare
KS1 KickStart Potential Relay and Start Capacitor
SKU:
96506
Rectorseal
SKU:
96506
Brand:
Rectorseal
(13)
–
+
$91.19
each
ADD TO CART
Add to List
In Stock
Get 148 by
Tue, Jun 16
Total Available: 554
In Stock
Get 148 by
Tue, Jun 16
Total Available: 554
Add to List
HSKT1 Compare Checkbox
Compare
Master Series Hard Start Kit w/ 500% Torque Increase (90/277V)
SKU:
HSKT1
Bluefin
SKU:
HSKT1
Brand:
Bluefin
(2)
–
+
$10.13
each
ADD TO CART
Add to List
In Stock
Get 298 by
Tue, Jun 16
Total Available: 1,242
In Stock
Get 298 by
Tue, Jun 16
Total Available: 1,242
Add to List
96503 Compare Checkbox
Compare
TO5 KickStart Potential Relay and Start Capacitor (1 to 3 Ton)
SKU:
96503
Rectorseal
SKU:
96503
Brand:
Rectorseal
(11)
–
+
$77.41
each
ADD TO CART
Add to List
In Stock
Get 231 by
Tue, Jun 16
Total Available: 587
In Stock
Get 231 by
Tue, Jun 16
Total Available: 587
Add to List
HSKT3 Compare Checkbox
Compare
Master Series Hard Start Kit w/ 300% Torque Increase (90/277V)
SKU:
HSKT3
Bluefin
SKU:
HSKT3
Brand:
Bluefin
–
+
$7.44
each
ADD TO CART
Add to List
In Stock
Get 340 by
Tue, Jun 16
Total Available: 913
In Stock
Get 340 by
Tue, Jun 16
Total Available: 913
Add to List
3W1 Compare Checkbox
Compare
3W1 Wire Hard Start Kit
SKU:
3W1
Supco
SKU:
3W1
Brand:
Supco
(53)
–
+
$31.82
each
ADD TO CART
Add to List
In Stock
Get 109 by
Tue, Jun 16
Total Available: 341
In Stock
Get 109 by
Tue, Jun 16
Total Available: 341
Add to List
SPP6E Compare Checkbox
Compare
Series E Super Boost Hard Start Kit, 88-106 MFD, 1/2-3 HP (170/277V)
SKU:
SPP6E
Supco
SKU:
SPP6E
Brand:
Supco
–
+
$34.54
each
ADD TO CART
Add to List
In Stock
Get 88 by
Tue, Jun 16
Total Available: 364
In Stock
Get 88 by
Tue, Jun 16
Total Available: 364
Add to List
SPP7S Compare Checkbox
Compare
Super Seven Wire Hard Start Kit
SKU:
SPP7S
Supco
SKU:
SPP7S
Brand:
Supco
–
+
$24.77
each
ADD TO CART
Add to List
In Stock
Get 86 by
Tue, Jun 16
Total Available: 308
In Stock
Get 86 by
Tue, Jun 16
Total Available: 308
Add to List
URCO210 Compare Checkbox
Compare
Ultimate Series Hard Start Relay, Overload & Start Capacitor, 1/3-1/2 HP, 13.3A RLA (115V)
SKU:
URCO210
Supco
SKU:
URCO210
Brand:
Supco
–
+
$14.95
each
ADD TO CART
Add to List
In Stock
Get 58 by
Tue, Jun 16
Total Available: 132
In Stock
Get 58 by
Tue, Jun 16
Total Available: 132
Add to List
3W2 Compare Checkbox
Compare
3W2 Wire Hard Start Kit
SKU:
3W2
Supco
SKU:
3W2
Brand:
Supco
(1)
–
+
$39.79
each
ADD TO CART
Add to List
In Stock
Get 86 by
Tue, Jun 16
Total Available: 266
In Stock
Get 86 by
Tue, Jun 16
Total Available: 266
Add to List
TQS6 Compare Checkbox
Compare
1/2 HP thru 10 HP ST Hardstart, 4000 thru 120000 BTU (115-277V)
SKU:
TQS6
TorQstart
SKU:
TQS6
Brand:
TorQstart
(3)
–
+
$16.98
each
ADD TO CART
Add to List
In Stock
Get 290 by
Tue, Jun 16
Total Available: 377
In Stock
Get 290 by
Tue, Jun 16
Total Available: 377
Add to List
HSKT2 Compare Checkbox
Compare
Master Series Hard Start Kit for 1 to 3 Ton A/C Units
SKU:
HSKT2
Bluefin
SKU:
HSKT2
Brand:
Bluefin
(4)
–
+
$28.35
each
ADD TO CART
Add to List
In Stock
Get 18 by
Tue, Jun 16
Total Available: 302
In Stock
Get 18 by
Tue, Jun 16
Total Available: 302
Add to List
RCO810 Compare Checkbox
Compare
Solid-State Hardstart Relay (110 to 125VAC)
SKU:
RCO810
Supco
SKU:
RCO810
Brand:
Supco
–
+
$20.15
each
ADD TO CART
Add to List
In Stock
Get 29 by
Tue, Jun 16
Total Available: 79
In Stock
Get 29 by
Tue, Jun 16
Total Available: 79
Add to List
URCO410RC Compare Checkbox
Compare
Ultimate Series Hard Start Relay, Overload, Start & Run Capacitor, 1/4-1/3 HP, 6.8A RLA (115V)
SKU:
URCO410RC
Supco
SKU:
URCO410RC
Brand:
Supco
(1)
–
+
$20.13
each
ADD TO CART
Add to List
In Stock
Get 9 by
Tue, Jun 16
Total Available: 33
In Stock
Get 9 by
Tue, Jun 16
Total Available: 33
Add to List
12600 Compare Checkbox
Compare
Easy Start 4 Turbo Universal Hardstart
SKU:
12600
MARS
SKU:
12600
Brand:
MARS
–
+
$94.67
each
ADD TO CART
Add to List
In Stock
Get 3 by
Tue, Jun 16
Total Available: 93
In Stock
Get 3 by
Tue, Jun 16
Total Available: 93
Add to List
DST-6 Compare Checkbox
Compare
Hard Start Kit - 500% Torque Multiplier
SKU:
DST-6
DiversiTech
SKU:
DST-6
Brand:
DiversiTech
(2)
–
+
$28.97
each
ADD TO CART
Add to List
In Stock
Get 30 by
Tue, Jun 16
Total Available: 141
In Stock
Get 30 by
Tue, Jun 16
Total Available: 141
Add to List
TQS5 Compare Checkbox
Compare
1/2 HP thru 5 HP ST Hardstart, 4000 thru 60000 BTU (115-277V)
SKU:
TQS5
TorQstart
SKU:
TQS5
Brand:
TorQstart
–
+
$14.93
each
ADD TO CART
Add to List
In Stock
Get 37 by
Tue, Jun 16
Total Available: 156
In Stock
Get 37 by
Tue, Jun 16
Total Available: 156
Add to List
SPP Compare Checkbox
Compare
Pow-R-Pak Solid State Relay for Hard Starting, 1/2-10 HP (90/277V)
SKU:
SPP
Supco
SKU:
SPP
Brand:
Supco
(1)
–
+
$8.12
each
ADD TO CART
Add to List
In Stock
Get 32 by
Tue, Jun 16
Total Available: 79
In Stock
Get 32 by
Tue, Jun 16
Total Available: 79
Add to List
HSKT4 Compare Checkbox
Compare
Master Series Hard Start Kit for 3.5 to 4.5 Ton A/C Units
SKU:
HSKT4
Bluefin
SKU:
HSKT4
Brand:
Bluefin
–
+
$31.79
each
ADD TO CART
Add to List
In Stock
Get 92 by
Tue, Jun 16
Total Available: 193
In Stock
Get 92 by
Tue, Jun 16
Total Available: 193
Add to List
SPP7E Compare Checkbox
Compare
Series E Super Boost Hard Start Kit, 130-156 MFD, 1-4 HP (170/277V)
SKU:
SPP7E
Supco
SKU:
SPP7E
Brand:
Supco
–
+
$34.48
each
ADD TO CART
Add to List
In Stock
Get 13 by
Tue, Jun 16
Total Available: 38
In Stock
Get 13 by
Tue, Jun 16
Total Available: 38
Add to List
3W3 Compare Checkbox
Compare
3W3 Wire Hard Start Kit
SKU:
3W3
Supco
SKU:
3W3
Brand:
Supco
–
+
$52.46
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tue, Jun 16
Total Available: 23
In Stock
Get 1 by
Tue, Jun 16
Total Available: 23
Add to List
DST-5 Compare Checkbox
Compare
Hard Start Kit - 300% Torque Multiplier
SKU:
DST-5
DiversiTech
SKU:
DST-5
Brand:
DiversiTech
(1)
–
+
$18.15
each
ADD TO CART
Add to List
In Stock
Get 31 by
Tue, Jun 16
Total Available: 104
In Stock
Get 31 by
Tue, Jun 16
Total Available: 104
Add to List
URSC10 Compare Checkbox
Compare
Universal Power Hard Start Relay, 1/20-1/2 HP (115V)
SKU:
URSC10
Supco
SKU:
URSC10
Brand:
Supco
(1)
–
+
$16.56
each
ADD TO CART
Add to List
In Stock
Get 21 by
Tue, Jun 16
Total Available: 67
In Stock
Get 21 by
Tue, Jun 16
Total Available: 67
Add to List
URCO210RC Compare Checkbox
Compare
Ultimate Series Hard Start Relay, Overload, Start & Run Capacitor, 1/3-1/2 HP, 13.3A RLA (115V)
SKU:
URCO210RC
Supco
SKU:
URCO210RC
Brand:
Supco
(2)
–
+
$22.62
each
ADD TO CART
Add to List
In Stock
Get 1 by
Wed, Jun 17
Total Available: 13
In Stock
Get 1 by
Wed, Jun 17
Total Available: 13
Add to List
HSKT5 Compare Checkbox
Compare
Master Series 3-In-1 Hard Start for Refrigerators - 115v (1/3 - 1/4 HP)
SKU:
HSKT5
Bluefin
SKU:
HSKT5
Brand:
Bluefin
–
+
$11.01
each
ADD TO CART
Add to List
In Stock
Get 181 by
Tue, Jun 16
Total Available: 630
In Stock
Get 181 by
Tue, Jun 16
Total Available: 630
Add to List
SPR1 Compare Checkbox
Compare
Ultra Start Series Hard Start, 270-324 MFD, 3.5-5 HP (330V)
SKU:
SPR1
Supco
SKU:
SPR1
Brand:
Supco
–
+
$50.18
each
ADD TO CART
Add to List
In Stock
Get 2 by
Tue, Jun 16
Total Available: 32
In Stock
Get 2 by
Tue, Jun 16
Total Available: 32
Add to List
SPP10E Compare Checkbox
Compare
E Series Hard Start Kit
SKU:
SPP10E
Supco
SKU:
SPP10E
Brand:
Supco
–
+
$58.38
each
ADD TO CART
Add to List
In Stock
Get 5 by
Tue, Jun 16
Total Available: 49
In Stock
Get 5 by
Tue, Jun 16
Total Available: 49
Add to List
TQS2 Compare Checkbox
Compare
3-1/2 HP thru 5 HP EM Hardstart
SKU:
TQS2
TorQstart
SKU:
TQS2
Brand:
TorQstart
–
+
$49.52
each
ADD TO CART
Add to List
In Stock
Get 12 by
Tue, Jun 16
Total Available: 99
In Stock
Get 12 by
Tue, Jun 16
Total Available: 99
Add to List
MPR1 Compare Checkbox
Compare
Hard Start Kit - Mechanical Potential Relay (MPR) & Start Capacitor
SKU:
MPR1
Supco
SKU:
MPR1
Brand:
Supco
–
+
$49.89
each
ADD TO CART
Add to List
In Stock
Get 8 by
Tue, Jun 16
Total Available: 54
In Stock
Get 8 by
Tue, Jun 16
Total Available: 54
Add to List
RO81 Compare Checkbox
Compare
Snap On Relay/Overload Combo (1/12 - 1/5 HP)
SKU:
RO81
Supco
SKU:
RO81
Brand:
Supco
(2)
–
+
$11.78
each
ADD TO CART
Add to List
In Stock
Get 13 by
Tue, Jun 16
Total Available: 79
In Stock
Get 13 by
Tue, Jun 16
Total Available: 79
Add to List
RO41 Compare Checkbox
Compare
Snap On Relay/Overload Combo (1/4 - 1/3 HP)
SKU:
RO41
Supco
SKU:
RO41
Brand:
Supco
(1)
–
+
$11.78
each
ADD TO CART
Add to List
In Stock
Get 44 by
Tue, Jun 16
In Stock
Get 44 by
Tue, Jun 16
Add to List
URCO810RC Compare Checkbox
Compare
Ultimate Series Hard Start Relay, Overload, Start & Run Capacitor, 1/12-1/5 HP, 4.05A RLA (115V)
SKU:
URCO810RC
Supco
SKU:
URCO810RC
Brand:
Supco
–
+
$17.71
each
ADD TO CART
Add to List
In Stock
Get 10 by
Tue, Jun 16
Total Available: 36
In Stock
Get 10 by
Tue, Jun 16
Total Available: 36
Add to List
HSKT6 Compare Checkbox
Compare
Master Series Hard Start Kit for 1 to 3 Ton Compressors
SKU:
HSKT6
Bluefin
SKU:
HSKT6
Brand:
Bluefin
–
+
$32.83
each
ADD TO CART
Add to List
In Stock
Get 30 by
Tue, Jun 16
Total Available: 53
In Stock
Get 30 by
Tue, Jun 16
Total Available: 53
Add to List
MPR5 Compare Checkbox
Compare
Ultra Start Series High Torque Hard Start, 189-27 MFD, 1-3 HP (330V)
SKU:
MPR5
Supco
SKU:
MPR5
Brand:
Supco
–
+
$48.70
each
ADD TO CART
Add to List
In Stock
Get 10 by
Tue, Jun 16
Total Available: 35
In Stock
Get 10 by
Tue, Jun 16
Total Available: 35
Add to List
URCO410 Compare Checkbox
Compare
Solid-State Hardstart Relay for High Efficiency Compressors (6.8A)
SKU:
URCO410
Supco
SKU:
URCO410
Brand:
Supco
(1)
–
+
$26.57
each
ADD TO CART
Add to List
In Stock
Get 10 by
Tue, Jun 16
Total Available: 36
In Stock
Get 10 by
Tue, Jun 16
Total Available: 36
Add to List
TQS1 Compare Checkbox
Compare
1-1/2 HP thru 3-1/2 HP EM Hardstart
SKU:
TQS1
TorQstart
SKU:
TQS1
Brand:
TorQstart
–
+
$40.74
each
ADD TO CART
Add to List
In Stock
Get 14 by
Tue, Jun 16
Total Available: 129
In Stock
Get 14 by
Tue, Jun 16
Total Available: 129
Add to List
SPR5 Compare Checkbox
Compare
Ultra Start Series Hard Start, 189-227 MFD, 1-3 HP (330V)
SKU:
SPR5
Supco
SKU:
SPR5
Brand:
Supco
–
+
$44.70
each
ADD TO CART
Add to List
In Stock
Get 6 by
Tue, Jun 16
Total Available: 21
In Stock
Get 6 by
Tue, Jun 16
Total Available: 21
Add to List
RSPP5 Compare Checkbox
Compare
Ranco Rocket Heavy-Duty Hard Start Kit w/ 300% Torque Increase (115/288V)
SKU:
RSPP5
Ranco
SKU:
RSPP5
Brand:
Ranco
–
+
$8.70
each
ADD TO CART
Add to List
In Stock
Get 7 by
Tue, Jun 16
Total Available: 24
In Stock
Get 7 by
Tue, Jun 16
Total Available: 24
Add to List
SPP5E Compare Checkbox
Compare
170-277v 43-52mfd Hard Start
SKU:
SPP5E
Supco
SKU:
SPP5E
Brand:
Supco
–
+
$30.57
each
ADD TO CART
Add to List
In Stock
Get 1 by
Tue, Jun 16
Total Available: 8
In Stock
Get 1 by
Tue, Jun 16
Total Available: 8
Add to List
HSKT7 Compare Checkbox
Compare
Master Series Hard Start Kit for 1 to 5 HP Compressors
SKU:
HSKT7
Bluefin
SKU:
HSKT7
Brand:
Bluefin
–
+
$25.43
each
ADD TO CART
Add to List
In Stock
Get 56 by
Wed, Jun 17
Total Available: 155
In Stock
Get 56 by
Wed, Jun 17
Total Available: 155
Add to List
0130M00441 Compare Checkbox
Compare
Hard Start Relay, 0130M00441
SKU:
0130M00441
Goodman-Amana
SKU:
0130M00441
Brand:
Goodman-Amana
–
+
$28.50
each
ADD TO CART
Add to List
Backorder
Get it by
Tue, Jul 14 - Tue, Aug 11
Backorder
Get it by
Tue, Jul 14 - Tue, Aug 11
Add to List
1
2
Refresh
×
Video