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Have a karcher pressure washer can not get it to switch from low to high pressure it has to be on the wand,but can't get it switched

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Either your switch or the spill valve inside the pump is defective. The following URL has exploded parts diagrams that you can use to disassemble your unit to check the parts:

http://www.m-and-d.com/karcher_parts.html

If you don't feel comfortable doing so yourself then have your local Karcher repair center do so.

Posted on Oct 07, 2009

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Posted on Jan 02, 2017

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Model # 5vp40e-1 Richmond power vent hot water heater made some ticking noises very faint and stopped heating up.fan does not run either.


First try turning off the switch, unplugging it, replugging it in and flipping the switch to restart it. If this doesn't work, the first thing I would check is the draft inducer(looks like blowdryer) and the pressure switch which looks like a flying saucer. If you flip the switch, the first thing you should hear is the draft inducer blowing. If it blows and then stops, jump out the pressure switch and try to relight. If that works, it's the pressure switch.Replace it. There are other safety devices like roll-out switches and hi-limit switches that may be bad. Also, your flue pipe could be clogged, or your vent on the draft inducer may be clogged. Those will set of a safety switch because of overheating. That may be the ticking you were hearing.This is especially likely if your water heater is located in the laundry room because of all the lint floating around. If you've never troubleshot low voltage electric circuits before, you are better off hiring a service mechanic.

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I have a new pressure switch but still have low water pressure


The pressure switch shouldn't be reducing pressure unless it is smaller that the water pipe. Pressure switches in water heaters are a safety device that activate when pressure builds up above a pre-defined limit. I'm guessing that the most probable cause of low water pressure is either not enough head into the water heater (this is the height of water pipe) or not enough mains pressure. Your best bet is probably to install an inline circulation pump with a flow sensor. This will automatically detect that water is being used and turn on to boost water pressure.

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My AMTROL water well tank is copying the pressure of the prussure switch


Sand the points on the pressure switch
Replace pressure switch
http://www.amazon.com/dp/B000BQSERE/?tag=waterheaterti-20

Test you are getting 240Volt to pressure switch
Turn breaker fully off and then fully back on

Replace control box or replace start capacitor:
http://www.amazon.com/dp/B0060C7GFO/?tag=waterheaterti-20

Drain tank, and replace the air valve
http://www.amazon.com/dp/B000BQYKJK/?tag=waterheaterti-20

Gene

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1 Answer

Wickes 102 combi boiler constantly loosing water pressure


It sounds like your thermostat could be the problem. Have you noticed the boiler cutting off at all, or does it run continuously until it goes out on low water?

You stated, "when boiler is on", so I am wondering how you get the boiler on. If your boiler is controlled by a thermostat, you need to check it for a cold draft possibly from behind the thermostat in the wall where the wires come through. The thermostat should never be on an outside wall. The thermostat could be defective.

An aquastat can also control your boiler. If you have an aquastat, check the setting, typically 175 - 180 degrees. You should also have a "high limit" which should be set at 210 - 220. Some people run that high side limit higher; not a good idea - defeats the purpose. If the aquastat is set too high, the boiler will operate too hot and the problem you have will occur.

"pressure rises and pressure relief valve opens" This could mean that your pressure switch is prematurely venting. Check boiler temperature to see exactly at what temperature the T&P valve purges. If it blows off below the high side setting, either adjust or replace. The T&P valves are usually not adjustable. That blow off temperature is stamped on the head of the valve. So, if it discharges too soon, replace it.

Have you actually seen evidence thgat the T&P valve is opening? You may have a bad bladder in your expansion tank and your system may have air in it. Your boiler should have 12 psi when cold and 20 - 22 psi when operating. Check your boiler pressure guage.

"
this eventually drops below the minimum operating pressure" Technically, there is set point for a NO MINIMUM OPERATING PRESSURE. That is a function of the amount of water in the boiler. If the T&P is blowing off, it will vent water from the boiler and the boiler pressure will go down. There is a minimum operating TEMPERATURE.

Your boiler could be low on water. You will have to manually fill the boiler. Be careful of thermal shock to the boiler. Feel the piping, and fill only when the circulator is running. Make sure the water is not going directly into the boiler. The supply water should go into the circulating supply side which feeds the radiators, radiant floor, or base board circuits.

All this will adversely affect your hot water. The heat exchanger for the potable hot water may have scale build up in it. Using the hot water keeps the boiler running, and a scaled heat exchanger will give you cooler hot water and the boiler keeps running. If this is a problem, you will need to replace the heat exchanger. A better idea is to not use the boiler for your domestic hot water. Why run the boiler in the summer?

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No hot water when heating tempreture reached.flow switch is operating, power at flow switch terminals on pcb (three wires),? but when working hot water runns for ever and heating runs ok too untill the...


I have a triton opal shower.

I turn shower on low pressure and cold water. then no low pressure and piping hot water for a very short time then low pressure and cold water.

I've changed the solenoid and the little black plastic ball.

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1 Answer

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if you have a gate valve on the unit from the hot water tank it could be as simple as the valve on the gas system being clogged going to that bathroom,, from how it is described it sounds like that would be the problem check to make sure all valve are not stuck in the on position ans change the valve if it is frozen in place

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Worcester bosch greenstar 25Si?30Si pressure gauge showing high


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