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 (3)
$45 to $50 (3)
$50 to $60 Filter (6)
$50 to $60 (6)
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 1,134 by
Fri, Jun 12
Total Available: 8,390
In Stock
Get 1,134 by
Fri, Jun 12
Total Available: 8,390
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 719 by
Fri, Jun 12
Total Available: 2,525
In Stock
Get 719 by
Fri, Jun 12
Total Available: 2,525
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 835 by
Fri, Jun 12
Total Available: 2,212
In Stock
Get 835 by
Fri, Jun 12
Total Available: 2,212
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 252 by
Fri, Jun 12
Total Available: 818
In Stock
Get 252 by
Fri, Jun 12
Total Available: 818
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 248 by
Fri, Jun 12
Total Available: 678
In Stock
Get 248 by
Fri, Jun 12
Total Available: 678
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 252 by
Fri, Jun 12
Total Available: 1,132
In Stock
Get 252 by
Fri, Jun 12
Total Available: 1,132
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 162 by
Fri, Jun 12
Total Available: 917
In Stock
Get 162 by
Fri, Jun 12
Total Available: 917
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 579 by
Fri, Jun 12
Total Available: 1,324
In Stock
Get 579 by
Fri, Jun 12
Total Available: 1,324
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 132 by
Fri, Jun 12
Total Available: 542
In Stock
Get 132 by
Fri, Jun 12
Total Available: 542
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 299 by
Fri, Jun 12
Total Available: 1,245
In Stock
Get 299 by
Fri, Jun 12
Total Available: 1,245
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
Fri, Jun 12
Total Available: 589
In Stock
Get 231 by
Fri, Jun 12
Total Available: 589
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 346 by
Fri, Jun 12
Total Available: 925
In Stock
Get 346 by
Fri, Jun 12
Total Available: 925
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 114 by
Fri, Jun 12
Total Available: 349
In Stock
Get 114 by
Fri, Jun 12
Total Available: 349
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 83 by
Fri, Jun 12
Total Available: 375
In Stock
Get 83 by
Fri, Jun 12
Total Available: 375
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 92 by
Fri, Jun 12
Total Available: 314
In Stock
Get 92 by
Fri, Jun 12
Total Available: 314
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 48 by
Fri, Jun 12
Total Available: 122
In Stock
Get 48 by
Fri, Jun 12
Total Available: 122
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 88 by
Fri, Jun 12
Total Available: 269
In Stock
Get 88 by
Fri, Jun 12
Total Available: 269
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 338 by
Fri, Jun 12
Total Available: 425
In Stock
Get 338 by
Fri, Jun 12
Total Available: 425
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
Fri, Jun 12
Total Available: 302
In Stock
Get 18 by
Fri, Jun 12
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
Fri, Jun 12
Total Available: 79
In Stock
Get 29 by
Fri, Jun 12
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
Fri, Jun 12
Total Available: 33
In Stock
Get 9 by
Fri, Jun 12
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 12 by
Fri, Jun 12
Total Available: 108
In Stock
Get 12 by
Fri, Jun 12
Total Available: 108
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 39 by
Fri, Jun 12
Total Available: 150
In Stock
Get 39 by
Fri, Jun 12
Total Available: 150
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 39 by
Fri, Jun 12
Total Available: 158
In Stock
Get 39 by
Fri, Jun 12
Total Available: 158
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
Fri, Jun 12
Total Available: 80
In Stock
Get 32 by
Fri, Jun 12
Total Available: 80
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
Fri, Jun 12
Total Available: 193
In Stock
Get 92 by
Fri, Jun 12
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 12 by
Fri, Jun 12
Total Available: 44
In Stock
Get 12 by
Fri, Jun 12
Total Available: 44
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 11 by
Fri, Jun 12
Total Available: 33
In Stock
Get 11 by
Fri, Jun 12
Total Available: 33
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
Fri, Jun 12
Total Available: 100
In Stock
Get 31 by
Fri, Jun 12
Total Available: 100
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
Fri, Jun 12
Total Available: 69
In Stock
Get 21 by
Fri, Jun 12
Total Available: 69
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
Fri, Jun 12
Total Available: 14
In Stock
Get 1 by
Fri, Jun 12
Total Available: 14
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
Fri, Jun 12
Total Available: 612
In Stock
Get 181 by
Fri, Jun 12
Total Available: 612
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
Fri, Jun 12
Total Available: 32
In Stock
Get 2 by
Fri, Jun 12
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
Fri, Jun 12
Total Available: 50
In Stock
Get 5 by
Fri, Jun 12
Total Available: 50
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
Fri, Jun 12
Total Available: 100
In Stock
Get 12 by
Fri, Jun 12
Total Available: 100
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
Fri, Jun 12
Total Available: 54
In Stock
Get 8 by
Fri, Jun 12
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
Fri, Jun 12
Total Available: 79
In Stock
Get 13 by
Fri, Jun 12
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
Fri, Jun 12
In Stock
Get 44 by
Fri, Jun 12
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 11 by
Fri, Jun 12
Total Available: 37
In Stock
Get 11 by
Fri, Jun 12
Total Available: 37
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
Fri, Jun 12
Total Available: 53
In Stock
Get 30 by
Fri, Jun 12
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 11 by
Fri, Jun 12
Total Available: 45
In Stock
Get 11 by
Fri, Jun 12
Total Available: 45
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
Fri, Jun 12
Total Available: 36
In Stock
Get 10 by
Fri, Jun 12
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
Fri, Jun 12
Total Available: 130
In Stock
Get 14 by
Fri, Jun 12
Total Available: 130
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
Fri, Jun 12
Total Available: 21
In Stock
Get 6 by
Fri, Jun 12
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
Fri, Jun 12
Total Available: 24
In Stock
Get 7 by
Fri, Jun 12
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
Fri, Jun 12
Total Available: 8
In Stock
Get 1 by
Fri, Jun 12
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 58 by
Mon, Jun 15
Total Available: 157
In Stock
Get 58 by
Mon, Jun 15
Total Available: 157
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
Fri, Jul 10 - Fri, Aug 7
Backorder
Get it by
Fri, Jul 10 - Fri, Aug 7
Add to List
1
2
Refresh
×
Video