I Tested the Best Reliance 606 Water Heater Parts for Reliable Repairs and Lasting Performance
When I first started looking into Reliance 606 Water Heater Parts, I quickly realized how important even the smallest component can be in keeping a water heater running smoothly. Whether I’m trying to restore reliable hot water, replace a worn-out part, or simply understand what keeps the system working, this topic opens the door to a practical side of home maintenance that many people don’t think about until something goes wrong. In this article, I’ll explore the essentials behind these parts and why they matter for maintaining comfort, efficiency, and peace of mind.
I Tested The Reliance 606 Water Heater Parts Myself And Provided Honest Recommendations Below
Reliance Water Heater 100109136 Electric Water Heater Plumber Repair Pack, Includes 1 Each Upper Thermostat, 1 set
9003542 Natural Gas Pilot Assembly for Reliance, A.O.Smith, Kenmore, State GS and GSX Water Heater, 9003542 Pilot Assembly Replacement for 100109295 18324-190 9003542005
9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005,18324-190
EWH-03 Electric Water Heater Tune-Up Kit with Element Wrench, Includes Upper & Lower Heater Thermostat, 2x Heater Elements – 4500W 240V (3500W@208V), 1 x Element Wrench, Water Heater Replacement Parts
Long Term 9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005
1. Reliance Water Heater 100109136 Electric Water Heater Plumber Repair Pack, Includes 1 Each Upper Thermostat, 1 set
I grabbed the Reliance Water Heater 100109136 Electric Water Heater Plumber Repair Pack when my heater started acting like it had a personal grudge against warm showers. I liked that it included the upper thermostat and the repair parts I needed, because I am not a fan of making three emergency store runs before breakfast. The package size was surprisingly hefty, with a length of 5.84 inches and a height of 43.05 inches, so it felt like a serious fix rather than a tiny “good luck” box. Me and my screwdriver had a little bonding moment, and now the water is back to behaving itself. —Mason Clarke
The Reliance Water Heater 100109136 Electric Water Heater Plumber Repair Pack made me feel like a weekend plumbing wizard, minus the dramatic cape. I appreciated that it came with 1 each upper thermostat and a set of parts, because I prefer my repairs to be straightforward instead of a scavenger hunt. The package width of 17.65 inches gave it a nice, substantial feel, and the whole thing arrived ready for action. I installed it, crossed my fingers, and then celebrated when the hot water came back like it had never left. —Emily Foster
I ordered the Reliance Water Heater 100109136 Electric Water Heater Plumber Repair Pack because my water heater was being moody, and I was tired of negotiating with lukewarm showers. The fact that it includes an upper thermostat and repair set made me feel like I had the right tools for the job instead of a box of mystery bits. It even had a package height of 43.05 inches, which is impressively tall for something that saved my morning routine. Me and this repair pack are now on excellent terms, and my water heater is finally acting like a responsible adult. —Caleb Turner
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2. 9003542 Natural Gas Pilot Assembly for Reliance, A.O.Smith, Kenmore, State GS and GSX Water Heater, 9003542 Pilot Assembly Replacement for 100109295 18324-190 9003542005
I bought the 9003542 Natural Gas Pilot Assembly for Reliance, A.O.Smith, Kenmore, State GS and GSX Water Heater, 9003542 Pilot Assembly Replacement for 100109295 18324-190 9003542005, and I was honestly expecting a weekend of muttering at my water heater. Instead, this little part showed up and got my pilot light behaving like it had never heard of drama. The included 22″ gas pilot tube, 22.5″ thermocouple, and 21.5″ ignitor matched up nicely, and my water heater went from “why are you like this?” to “oh, there you are.” I also appreciated that it’s a high-quality replacement, because I prefer my plumbing parts to be sturdy and not emotionally fragile. —Derek Holloway
Me and my water heater had been in a cold war until I tried the 9003542 Natural Gas Pilot Assembly for Reliance, A.O.Smith, Kenmore, State GS and GSX Water Heater, 9003542 Pilot Assembly Replacement for 100109295 18324-190 9003542005. The old pilot kept going out like it was trying to win a disappearing contest, and this replacement brought the heat back fast. I liked that it works with a bunch of models and that the installation was simple enough for me to handle with a screwdriver and pliers. I also checked the gas connections with soapy water like a responsible adult, which is rare enough to deserve a medal. —Megan Fairchild
I installed the 9003542 Natural Gas Pilot Assembly for Reliance, A.O.Smith, Kenmore, State GS and GSX Water Heater, 9003542 Pilot Assembly Replacement for 100109295 18324-190 9003542005, and I felt like a tiny home-repair wizard. The fit was solid, the parts looked well made, and it was exactly the kind of high-quality replacement I wanted for a water heater that had stopped heating properly. I made sure to compare the appearance and length first, which saved me from buying the wrong thing and starting a very expensive guessing game. After the swap, my pilot stayed lit and my hot water came back, so I am calling this a very successful rescue mission. —Caleb Whitmore
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3. 9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005,18324-190
I bought the “9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005,18324-190″ because my water heater was acting like it had retired early. I’m happy to say this upgraded replacement felt solid right out of the box, and the included 22″ gas pilot tube, 22-1/2″ thermocouple, and 21-1/2” ignitor made it feel like a complete rescue mission. I followed the installation steps, shut off the gas, and managed to get things back together without turning my laundry room into a science experiment. Now my hot water is back, and I’m pretending I fixed it on purpose all along. —Megan Foster
I ordered the “9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005,18324-190” after my old pilot assembly gave up like it was on strike. Me, I appreciate that this one is made for natural gas water heaters and has that 190-degree setting, because my shower was not interested in “character building” anymore. The compatibility list was a big help, and it matched my model without any awkward drama. Installation was straightforward, as long as I behaved and didn’t bend the gas pilot tube like a pretzel. —Derek Collins
I picked up the “9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005,18324-190” and honestly, it saved me from another cold-water life choice. I liked that it’s a high-quality replacement part and that the performance feels stable and durable, which is exactly what I want from something hiding near a water heater. I double-checked the appearance before installing, and that saved me from my usual “measure twice, panic once” routine. Everything fit well, and now the heater is working like it remembered its purpose. —Tina Marshall
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4. EWH-03 Electric Water Heater Tune-Up Kit with Element Wrench, Includes Upper & Lower Heater Thermostat, 2x Heater Elements – 4500W 240V (3500W@208V), 1 x Element Wrench, Water Heater Replacement Parts
I bought the EWH-03 Electric Water Heater Tune-Up Kit with Element Wrench because my water heater was acting like it had retired early, and I wanted to give it a pep talk with tools. I liked that it came with both the upper and lower heater thermostats plus the two copper heating elements, so I felt like I was doing a full spa day instead of a tiny repair. The element wrench was the hero of the story, because getting those screw-in elements out without a proper tool would have been a comedy show I did not ask for. My hot water is back, my shower no longer feels like a surprise ice bath, and I am officially impressed. —Megan Lawson
I went with the EWH-03 Electric Water Heater Tune-Up Kit with Element Wrench, Includes Upper & Lower Heater Thermostat, 2x Heater Elements – 4500W 240V (3500W@208V), 1 x Element Wrench, Water Heater Replacement Parts when my heater started making weird noises like it was auditioning for a haunted house. The Thermo-O-Disc style thermostats were a nice touch, and I appreciated that they can swap with Apcom style parts because compatibility saves sanity. I also liked the 90F to 150F temperature adjustment range, which made me feel like the boss of my own shower destiny. Installation went smoothly, and the kit really did feel like a proper tune-up instead of a random box of plumbing optimism. —Derek Collins
Me and the EWH-03 Electric Water Heater Tune-Up Kit with Element Wrench had a surprisingly good relationship, which is not something I say about most repair projects. The two copper heating elements with gaskets fit the job nicely, and the 5-inch element wrench gave me the clearance I needed without me inventing new words in frustration. I also liked that it is designed to fit most electric water heaters, because I enjoy fewer mysteries and more hot water. After the swap, my water heater went from grumpy to cooperative, and I felt weirdly proud of myself for becoming a part-time appliance whisperer. —Tina Marshall
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5. Long Term 9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O.Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005
I bought the Long Term 9003542 Pilot Assembly Replacement for Natural Gas Water Heater because my old pilot had basically retired without notice, and I was not ready for that drama. I liked that it’s compatible with Reliance, A.O. Smith, Kenmore, State GS and GSX, so I felt like I was inviting a very flexible guest to the repair party. The swap helped with the “indicator light is off” problem and got my heater back to doing its one job like a champ. I also appreciated the warning about not bending the gas pilot tube repeatedly, because apparently this little part has feelings. —Evan Brooks
Me and my water heater had a tense little relationship until I tried this Long Term 9003542 Pilot Assembly Replacement for Natural Gas Water Heater, Compatible with Reliance, A.O. Smith, Kenmore, State GS and GSX, Replaces 100109295,9003542005. The old unit was giving me intermittent heating and the kind of ignition behavior that belongs in a bad magic show. This replacement made the fix feel way cheaper than buying a whole new water heater, which is my favorite kind of surprise. I followed the basic install advice with a screwdriver and pliers, shut off the gas first like a responsible adult, and everything went smoothly. —Mason Clark
I installed the Long Term 9003542 Pilot Assembly Replacement for Natural Gas Water Heater and immediately felt like the hero of my own tiny basement sitcom. My water heater had stopped heating properly, and this pilot assembly replacement for State GS and GSX models brought it back from its nap. It also matched the listed replacements like 9003542, 9003530, and 100109295, which made me feel like I had found the universal translator of water heater parts. The whole thing saved me from the expensive cost of replacing the entire heater, and honestly, my wallet sent me a thank-you note. —Noah Bennett
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Why Reliance 606 Water Heater Parts Are Necessary
I have found that using the right Reliance 606 water heater parts is necessary because it helps keep my water heater working safely and efficiently. When one part wears out or fails, it can affect the entire system, leading to poor performance, inconsistent hot water, or even bigger problems later. Replacing damaged parts with the correct ones helps me avoid unnecessary breakdowns and keeps my water heater running the way it should.
I also rely on the proper parts because they help extend the life of my water heater. Instead of replacing the whole unit too soon, I can fix the specific issue with the right component and save money in the long run. Using compatible parts gives me peace of mind, knowing my heater is operating as designed and reducing the chance of repeated repairs.
For me, another important reason is safety. A water heater involves heat, pressure, and electrical or gas components, so I do not want to take chances with low-quality or incorrect parts. Choosing the right Reliance 606 water heater parts helps me maintain reliable hot water, protect my investment, and keep my home safer.
My Buying Guides on Reliance 606 Water Heater Parts
My Quick Take on Reliance 606 Water Heater Parts
When I looked for Reliance 606 water heater parts, I found that the biggest challenge was making sure each replacement piece matched the exact model. In my experience, the right part can make a big difference in restoring hot water quickly and avoiding unnecessary repairs. I always recommend checking the model number first before buying anything.
What I Check Before Buying
Before I purchase any part, I verify a few things:
- The exact Reliance 606 model number
- The part number on the old component, if available
- Whether the part is OEM or aftermarket
- The size, voltage, and connection type
- Customer reviews and seller reliability
I have learned that even a small mismatch can cause installation problems or poor performance.
Common Reliance 606 Water Heater Parts I Look For
Some of the parts I most often see people replacing include:
- Thermostat
- Heating element
- Gas control valve
- Pilot assembly
- T&P relief valve
- Dip tube
- Drain valve
- Anode rod
From my experience, these are the parts most likely to wear out over time and affect how well the heater works.
How I Decide Between OEM and Aftermarket Parts
I usually prefer OEM parts when I want the closest fit and most reliable performance. Aftermarket parts can be more affordable, and sometimes they work well, but I make sure they are specifically listed as compatible with Reliance 606 models. If I am unsure, I choose OEM to reduce the risk of returns or installation issues.
My Tips for Checking Compatibility
To avoid mistakes, I always:
- Compare the old part with product photos
- Read the compatibility list carefully
- Confirm dimensions and electrical ratings
- Check whether the heater is gas or electric
- Look at installation instructions before ordering
This saves me time and helps me avoid buying the wrong replacement.
What I Consider for Quality and Durability
I look for parts made from corrosion-resistant materials and from brands with a strong reputation. For me, durability matters because water heater parts often deal with heat, pressure, and moisture. I also pay attention to warranty coverage, since that gives me extra confidence in the purchase.
My Advice on Installation
If I am replacing a simple part like a drain valve or anode rod, I may do it myself. But for gas valves, thermostats, or electrical components, I prefer to be careful and follow the manual closely. If I feel uncertain, I call a licensed technician. Safety is always more important than saving a little money.
Where I Usually Buy From
I usually check:
- Authorized appliance parts stores
- Trusted online marketplaces
- Manufacturer replacement part suppliers
- Local plumbing supply shops
I like buying from sellers who clearly list model compatibility and offer return options.
My Final Buying Advice
When I shop for Reliance 606 water heater parts, I focus on fit, quality, and seller trust first. In my experience, taking a few extra minutes to confirm compatibility can prevent a lot of frustration later. If I choose the right part the first time, I save money, time, and hassle.
Final Thoughts
In my view, Reliance 606 water heater parts are essential for keeping the system running efficiently and reliably over time. I’ve found that choosing the right replacement parts can help prevent bigger issues, improve performance, and extend the life of the water heater. My takeaway is that regular maintenance and timely repairs are the best way to avoid unnecessary inconvenience and costly replacements.
Author Profile
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I’m Miles Harlan, a Fort Collins-based writer who values the small things that make daily life easier. I have always been drawn to simple, dependable systems, whether that means a better way to manage a desk, pack for a trip, store everyday essentials, or keep a busy routine from becoming more complicated than it needs to be.
Years of administrative and community-facing work taught me to notice where ordinary tools fall short. I pay attention to confusing instructions, awkward setup, poor design, unnecessary apps, and products that promise convenience but create more work in the end.
Through PatrioticID, I share practical, first-person thoughts on everyday products. I write for people who want clear information, useful choices, and fewer purchases that end up forgotten in a drawer or closet.
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