Laing Autocirc instant hot water pump. Cold water has pressure but does not come out cold. It takes 2 to 3 minutes of running cold before the faucet becomes somewhat cold. If the faucet is turned off. the cold side of the faucet instantly becomes luke warm again.
SOURCE: I have a Rinnai system. Good cold water pressure, little hot.
What type of pipes are install on this heater?
SOURCE: low pressure on hot water taps and showers
Many states building codes require a pressure regulator and expansion tank for hot water heater installation. Check the pressure regulator if you have one as this would only affect the hot water pressure. Adjust or replace. Rap the expansion tank like knocking hard on a door. Hollow sound is good. Dull thud means it needs to be replaced as it is filled with water.
SOURCE: Instant hot water dispenser does not heat water.
I had the exact same problem. I even replaced the first unit with a second unit...because I was sure I hooked everything up correctly. Then I called their support line and and felt very stupid. They asked one question "are you plugging in the Quick&Hot into the same electrical outlet as the garbage disposal"?. I said yes..and the garbage disposal works fine (thinking that this indicates a good electrical outlet). She then said "That outlet works off of a switch so no electricity is getting to the Quick&Hot until the disposal is turned on). Gosh darn it...that made total sense. I then tested this out by plugging an extension cord into a different outlet and it worked fine. Boy...do I feel stupid. Hope this helps.
SOURCE: I have very low hot water pressure in may
You have clog in hot water line or inside water heater.
Use Brady BTG100 pressure gauge to assist.
http://www.ronshomeandhardware.com/BTG-100-100-PSI-Water-Pressure-Gauge-p/405357.htm
Put gauge on outdoor spigot and then turn on hot water to get baseline.
Put gauge on water heater drain, and then turn on hot water. If pressure stays high, then clog is in hot water nipple or inside pipes after water heater.
If pressure drops, then clog is in cold water nipple, shut off valve above tank, or somewhere in line between main cold water and water heater.
Water heater nipples, shut off to water heater, and elbows are good suspect.
Any galvanized and copper connection is good suspect.
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SOURCE: Laing model 330 Pump not working-delay in hot
Question not 100% clear.
1) The pump is not working? Does the pump make a noise? if pump is not working full-time, it can cause delay in arrival.
If pump motor is suspect, and outlet has power, then check override switch located on timer. Set override to Timer, move some of the trippers outward, then manually rotate timer dial until pump turns ON.
http://waterheatertimer.org/images/IMG_9325-grundfos-timer-800.jpg
If no noise is detected, or noise stops and starts, or seems strained, or if pump is hot, then pump motor may have burned out.
2) If pump is working, and makes noise like a humming sound, and pump motor is not hot, but hot water is not circulating, then unplug pump so it will not overheat and burn up.
Disassemble the pump and cross-over piece. Clean piping with white vinegar or CLR. Do not soak in CLR or it will damage seals. Rinse parts thoroughly. Reassemble and see if problem is resolved.
If pump is vibrating, then suspects include sediment and/or air inside line, and this can be resolved by cleaning as described. Also install air vent to increase life of pump.
3) Other causes for hot water delay at faucet are crossover.
Crossover can be caused by bad single-handled faucet cartridge, and/or by clogged-or-failed check valve on cross-over piece on grundfos.
This type of problem lets cold water enter hot line, and causes delay in arrival of hot water. Clean-or-replace the grundfos cross-over piece, and replace bad faucet cartridge.
Open following link for testing instructions:
http://waterheatertimer.org/Crossover.html
Resources:
http://waterheatertimer.org/Water-heater-recirculation-system.html
http://waterheatertimer.org/pdf/Troubleshoot-recirculation.pdf
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