Question about Dunkirk Q90-75 Quantum High Efficiency Condensing Gas Boiler, Taco

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Installed a year-and-a-half ago, problems so far: thermostat replaced on hot water tank within one month of installation, one pump replaced, leaking plug in the front of boiler with Dunkirk rep never

Dunkirk Q90 boiler and Weil McLain hot water tank installed Oct 2011. Dunkirk rep has determined we do not have a warranty issue without ever contacting us or looking at the unit. We've spent over $800 on repairs so far.

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Its probably time for small claims court and a new company to install good equipment. Have a couple different companies/contractors give an estimate and possibly expert advice/witness you would then be able to use in court so you can get reimbursed from a bad company. Hope it all works out.

Posted on Apr 20, 2013

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Posted on Jan 02, 2017

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Bosch 125fx heater barely heats water


1) Recommend replacing tankless with ordinary tank-type gas water heater.
http://waterheatertimer.org/How-to-install-gas-water-heater.html
http://hometips.me/Mar/Which-is-best-gas-water-heater.pdf

2) Tankless cannot be exposed to more than 11 grains hardness in water or unit will fail within 2-5 years. Water softener is required.
http://hometips.me/Tls/Battelle_Water-softening-research.pdf

3) Descaling tankless water heater each year will not restore functionality, or restore efficiency of tankless, nor restore full efficiency to tank-type gas water heater.

4) Bradford White side-by-side testing research comparing their tankless with their tank-type shows that tankless will save $1-8 per month on energy bill vrs ordianry tank-type ....but conclude that tankless 'fall far short of payback' due to maintenance, repair, installation and replacement costs.
Study compared full cost, and not just monthly energy bill, since All costs are energy.

Feb 16, 2013 | Water Heaters

1 Answer

Water heater


Guessing that you have 240Volt residential non-simultaneous electric water heater? And that you have 30 amp breaker and 10 gauge wire. And that water heater is located within 100 feet of breaker box. And there are no leaks running hot water out of tank. And that you installed fully brand NEW elements of same wattage as old elements. And that fully brand new thermostats were installed, and wiring exactly duplicates wiring that was present before. And that factory-insulation was re-installed over elements and thermostats.

1) Guessing the 'hot water shut off' means the ECO red reset button located on upper thermostat keeps tripping and cutting off electric power to water heater?
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
http://waterheatertimer.org/images/WH-w-combined2-1000.jpg
http://waterheatertimer.org/How-to-test-water-heater-wires.html

2) If the ECO is tripping, then water is getting too hot, or there is shorted wire located near the upper thermostat, .
Typically replacing both thermostats and replacing elements will solve this problem .... assuming that new thermostats and elements are good, and wiring correct.
Double-Check your wiring on upper and lower thermostats.
Test wires for short.
Make sure factory-insulation is re-installed over thermostats so cool room temperature will not affect temperature reading.
Check that thermostats sit flat against steel tank.
Many short draws hot water can also cause stacking event that will trip circuit breaker.

3) Add comment and say what you find using checklist above.
Be careful to explain findings fully, using same words found on links above, so illuminated diagnosis can be made.

Dec 28, 2012 | Water Heaters

1 Answer

How long does the model 81v52d last in years?


Did you clean sediment out of tank when replacing elements?
Did you replace thermostats? Thermostats go bad, or get out of calibration.
Copy following link for tank-type electric water heater troubleshoot:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Test elements.
Sounds like lower element is burned out.
Clean sediment out of tank. Check for water leak running hot water out of tank by putting ear against pipe.
Replace both thermostats.

Electric water heater will last 20+ years, IF ...
Electric water heater is totally unique because it can last forever with part replacement using parts from hardware store, as long as tank does not rust because of depleted anode rod, and pressure is kept below 80psi.
http://waterheatertimer.org/How-to-maintain-water-heater.html
Annual water heater maintenance will pay you $10 a month, tax free money in pocket, by avoiding tank replacement.

Nov 25, 2012 | Water Heaters

1 Answer

Noritz NR98-DVC tankless water heater won't give hot water thru a single valve fixture. Gives us all the hot water we want on a double handled fixture. Any suggestions on what to do?


Replace single-handled faucet cartridge, and see if hot flows to that faucet again.
http://waterheatertimer.org/Crossover.html

Exposing tankless to hard water causes reduced efficiency within a few months, and can cause Total failure of parts within two years.
Do not expose tankless to more than 11 grains hard water.
Here is research pdf conducted by water softener industry comparing tankless andf tank-type:
http://waterheatertimer.org/pdf/Battelle_Final_Report.pdf

To solve problem long-long term, install tank-type gas water heater from local box store for $350.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Oct 12, 2012 | Noritz NR98-DVC-NG 100W Freeze Tankless...

1 Answer

I have a 40 gallon rheem water heater for a mobil home that is leaking from the top.


If water heater is leaking, then open following 2 links to avoid tank rupture and troubleshoot leak:
http://waterheatertimer.org/Emergency-steps-for-leaking-water-heater.html
http://waterheatertimer.org/Water-heater-is-leaking.html

Open following link if you want to install your own gas water heater:
http://waterheatertimer.org/How-to-install-gas-water-heater.html

40 gallon electric heater at Lowes costs 207, and is easy do-it-yourself using same basic information shown in link above for installing gas heater, except less work.

To have gas water heater installed, can run $2-300 for installation plus cost of heater.
40 gallon natural gas water heater at Lowes starts at $300+, and tanks with longer warranty cost more and last longer.
Trailers require specific type of gas water heater, so be sure to request correct model.

If you maintain the tank: keep chemicals out of same room as gas water heater, attach bare copper ground wire between hot and cold pipes, flush tank each 6 months, clean gas burner each year as shown in manual, read the manual entirely for specific information about your model, and inspect/replace anode rod every 2-3 years then basic 6-year tank can last much longer.
http://waterheatertimer.org/Replace-anode-rod.html
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

Apr 08, 2011 | Water Heaters

1 Answer

Water leaking observed from the bottom of the tank. What's the problem? Should I replace the old 21V40-2 unit? if so, what kind of tank is ok to replace the present unit? What's the price and installation...


If water heater is leaking, then open following 2 links to avoid tank rupture and troubleshoot leak:
http://waterheatertimer.org/Emergency-steps-for-leaking-water-heater.html
http://waterheatertimer.org/Water-heater-is-leaking.html

Open following link if you want to install your own gas water heater:
http://waterheatertimer.org/How-to-install-gas-water-heater.html

To have gas water heater installed, can run $2-300 for installation plus cost of heater.
40 gallon natural gas water heater at Lowes starts at $300+, and tanks with longer warranty cost more and last longer.

If you maintain the tank: keep chemicals out of same room as water heater, attach bare copper ground wire between hot and cold pipes, flush tank each 6 months, clean burner each year as shown in manual, read the manual entirely for specific information about your model, and inspect/replace anode rod every 2-3 years then basic 6-year tank can last much longer.
http://waterheatertimer.org/Replace-anode-rod.html
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

Apr 07, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Re: Rheem Water Heater Model# 82V52-2 (date of Mfg 07/2007) A few months after an installer replaced our old water heater, we had an event one day where there was no hot water. The installer advised how...


There is a solution.
Ordinary tank-type electric water heaters are fully repairable by homeowner.

You have a new heater that works fine most of the time, but reset button trips.
That says tank is getting correct electricity.
It says that elements are good.
And you don't have sediment problem with new tank.

If you do not want to test parts, then replace upper and lower thermostats for $28.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html
The reason I suspect defective thermostat is that tank has 4 parts: 2 elements and 2 thermostats, and you have plenty of hot water so elements are probably good.
The reason I replace both thermostats is to avoid uncertainty.
Tighten screws very tight against copper wire.
Be sure to put back insulation and covers on water heater so thermostats not exposed to cool air which can lead to overheated water.
Then send bill for $28, plus labor and aggravation to Rheem
Your plumber should have done this for you as part of warranty, but sometimes self-sufficiency is valuable.

If you want to test water heater parts before replacing anything, then buy multimeter and take 30 minutes to become electric water heater expert:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
Buy cheap multimeter at home center.
When testing continuity or testing elements, rotate multimeter dial to Ohms.
When testing for voltage,, rotate multimeter dial to 240-250-277 VAC

You can also double check anything fixya or plumber tells you by posting question on professional water heater forum like the Tank:
http://www.thetankatwaterheaterrescue.com/forums/forum3/

Jan 02, 2011 | Rheem 50 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Water is found leaking at the bottom of the tank, near the plastic cap, at the centre of the tank. What actually happens and how to resolve. The heater has been installed more than 5 years ago. From the...


A) Calculate date of water heater manufacture from serial number located on side of tank:
http://waterheatertimer.org/pdf/WaterHeaterSerialNumberDecoder.pdf
Date of manufacture is not date of installation.
Warranty is usually from date of manufacture
Serial number also shows tank size in gallons, tank volts and watts, and whether tank has 1 or 2 elements.

B) Troubleshoot leaking water heater:
http://waterheatertimer.org/Water-at-bottom-of-water-heater.html
Several things can be looked at to see where leak is coming from.
Carefully go over tank pipes and valves to eliminate every suspect.
Final suspect: tank is rusted out.

C) If tank is rusted out, then tank needs to be replaced before it ruptures.
Ruptured tank can cause major damage and water runs until shut off.
To prevent rupture, turn off power to heater, turn off valve located above tank, open tub faucet for a moment to relieve pressure on tank.
Turn on heater only when needed until new tank is installed.
4500 Watt water heater produces 21 gallons hot water per hour.
Shower uses 6-9 gallons hot water. Bath uses 12-14 gallons hot water.

"It is possible to limp along with a failed water heater if the leak is slow and if you turn off power and water when not using hot water. That trick could buy time, possibly up to 3 months. With time, you can consider how to make the system do more for less as well as comparison shop, get competitive bids, etc"

D) Now you're home is safe from damage.
If tank is only 5 years old, it rusted out pretty quick.

There are three things you can do so next heater lasts longer.

1) Learn about anode rods, and inspect anode rod every 1-3 years.
Loosen anode rod before installing new tank so replacement is easier.
http://waterheatertimer.org/Replace-anode-rod.html

2) Attach electrical ground wire between hot and cold pipes to prevent stray current from reducing life of water heater
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html#straycurrent

3) Flush tank each 6 months to prevent sediment
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html#flushelectric

Dec 28, 2010 | Rheem 81VP6S/430126 Water Heater

5 Answers

Paloma tank less water heater flashes code C4 13 and we have no hot water?how to fix it?


I had the same problem with my Paloma a year and a half after installation...contacted Rheem customer service (800-432-8373) and they recommened a local installer in my area. The technican diagnosed the problem as the "flow control valve"; he managed to get Rheem/Paloma to cover the part under warranty...I only had to shell out the money for the install.

Nov 16, 2009 | Rheem Paloma Tankless Water Heaters...

1 Answer

Hot Water inconsistent


Something you can do, following your fathers logic,   is to attach a hose to the drain of the tank and run water from the bottom of the tank into a drain untill all the sediment is removed (Water runs clean). This is normally done once a year as preventive maintenance  on all tank type water heaters. The logic sounds good to me. 

Feb 16, 2009 | General Electric GE SmartWater Household...

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