SPP6 Hard Start Capacitor Replacement 115V Thru 288VAC Hard Start kit for air Conditioner Units from 4,000 to 120,000(1/2 Thru 10H.P.),Increases Compressor Torque 500% by AMI PARTS

Quick delivery which was helpful with the crazy heat wave. The compressor was not kicking on, but the fan was working fine. I keep a spare capacitor on hand as they are cheap and the usual cause of AC units not to function. However, on this case the capacitor was fine. A friend in the AC repair field told me about these hard starters and at $15 I considered it a safe bet. Easy to hook up, please search the internet for some instructions on installation. Three days now of a working AC unit without a service call!! Update 07/22/2025 Still going strong!! Buying an extra one to sit on the shelf in the garage in case anything happens in the future. Small investment for having the AC down for just a few minutes.

Purchased this based on a ChatGPT recommendation—helps protect your AC compressor. Durability: Worked perfectly all summer. It’s just a capacitor, so I don’t expect any issues. I’ll update if anything changes. Installation: Easy. If unsure, ask your favorite AI chatbot! they’ll guide you, and tell them I referred you so they will be nice to us both later when they concur the world 😉!

Originally used this to test to see if my compressor was bad, it actually kicked over my compressor that was failing to start but then the compressor sounded like it had rocks in it, so for sure my compressor was bad. However, this device apparently make compressors last longer since they don't have to work as hard to turn over, so my new compressor should hopefully last longer.

Saved me $280 bucks (compared to HVAC quote) and installed in 5 minutes.

HVAC Unit stopped cooling - sounded like compressor just couldn't get going. The HVAC Company told me the compressor was locked up, and the Capacitor seemed ok, so given furnace/compressor was 25+ years old, it would ALL need to be replaced (for $12,000 to $15,000). The Tech said they COULD install a hard start capacitor that MIGHT fix the issue temporarily for $340, but as soon as they started to install it, it was paid for & no refunds. Didn't want to gamble $340 for potentially nothing, so sent them on their way (with $100 for the SVC call). I then started googling and learning about hard start capacitors. Bought this unit for $15 and installed it the next day without difficulty. Compressor started up immediately and ran fine, so this was pretty good for $15! Of course the question is how LONG will it last? No idea, but if I can get through this Summer I will be very happy, and I know some people have eked out a couple of years usage with these things. One comment: many DIY Videos fail to mention that capacitors can hold a charge AFTER the breaker panel is turned off. BE SURE to discharge existing capacitor by grounding out all the lugs with a screwdriver with an insulated handle! I knew to do that already, but I am sure some novices could get zapped otherwise.

***UPDATED REVIEW*** You will note that they sell this in a multi-pack. Get the multipack. First one worked great for 14 months...and then completely stopped working. Replaced the SPP6 and back in action. It really works great and does what my compressor needed, but you will save yourself some eventual heartache if you get the multi-pack. Original Review Below: My Florida Heat Pump (now owned by Bosch) compressor was failing to start when the system commanded it to start. It would hum for about 5 seconds and then time out. This cycle would repeat over and over, sometimes starting and sometimes the system seemed to quit trying (after about ten minutes and 50 or so failed starts of the compressor). Anyway, this piggy back capacitor is simply added in parallel to the existing capacitor and it works like a champ. Two things to note: (1) capacitors can zap you even when you've removed the 220Vac at the breaker...you must discharge the existing capacitor or you'll become the discharge path and that's gonna hurt... and (2) it's possible you just need to replace your existing capacitor and this boost is unnecessary. If your compressor is older and a capacitor swap didn't fix your problem, this is the easy button you were hoping for. As for how long this bandaid fix will last, I dunno, but, at the price of a new compressor, this thing will pay for itself in about a month or two.

Its true! This thing provides the necessary kick for older compressors! I'm more than pleased with the AMI PARTS SPP6 Hard Start Capacitor Replacement! I was experiencing issues with my air conditioner unit, particularly during hot summer days when it would struggle to start. After installing the SPP6, I've noticed a HUGE difference. The installation process was straightforward, and the instructions provided were clear and concise. The quality of the capacitor is top-notch, and I can already feel the increased compressor torque - it's like a whole new unit! I think the SPP6 has improved the performance of my air conditioner and possibly made it more energy-efficient.

This was very easy to install and is a must have for older ac’s. I installed this 2 different ac units that were having a hard time starting up. Both units have been working great with no problems after I installed new run capacitors and these hard start kits. Best money spent to have these ac units running again. One of the owners had an ac tech look at the unit and he said the unit was low on Freon and need to be replaced. I went there put in a new run capacitor and this hard start kit. The owner hasn’t had a problem since. And that was in the middle of a heat wave. So if you have an older ac unit this could be the answer you have been waiting for. Before purchasing a new ac unit at the least try a new run capacitor and this hard start kit. It could be the answer that you have been looking for. Also it’s a lot cheaper to give a shot at than a new ac unit.