My heater is able to warm the water but not make it hot. Is there a safety shutoff that needs to be reset? Is that the thermal cut out?
1504163
I own one and I love it! First thing to check is the temperature adjustment knob under the unit is turned fully clockwise. The temperature rise can vary widely based upon that and other things, such as... the incoming water temperature, the flow in GPM (consider the flow all fixtures whixh are being used at the same time if more than one are... the higher the flow rate, the lower the water temperate rise. Also, if yours is a 240VAC unit and your actual voltage is less like 220VAC it won't warm water as much as 240 does. If your faucets, etc. are too far from the heater... some heat can be lost in the run of pipe, especially if it is in a cold area. Note that what causes thermal shutdowns to occur is overtemp, this can happen if the flow is restricted quite a bit, but high enough to activate the heater, and when the incoming water temp is very high. Also never try to connect this type of heater to water the is already preheated. I have some AE9.5 units as well and I know they have the thermal shutdown, I think all Bosch units do.
1504164
My unit has two channels to heat the water. This is my second unit. After a few minutes the max temp drops and comes back for brief periods. I believe the electronic control is doing a poor job of output temp control and is dropping one of the heaters off.Bosch and other brands using the same unit, is poor quality unit and I would not buy again. I do not know who makes a better unit. The cost to put a unit in and then swap it out is very high. Both of my units did not work well. I once had a gas powered unit from Japan and it was perfect.Cheers, roy
1504165
You probably have a lot of lime scale build up in the heater if the Thermal couple keeps cutting out.Google this and you will see that this is the problem and need to send it in for service. Be sure toinstall a filter after the heater and a water softener or anit scale cartridge before the heater, it really works and saves the heater!
1002689
Most likely the heat element burned out. Local repair shops would not fix it even tho still on warranty. Returned the unit to Oreck. They sent a new one which works ok.
1620341
Yep, the heat may be shut off (via a switch in the back) thereby just giving room-temp water. The cold water has a stat / adjustment nob. I've simply left it at the factory setting...cold but not too cold for me...
1972003
Just make sure u regularly check temp and unplug when water temp is at described temp for whatever you're holding in aquarium. All heaters are prone to burn out eventually. Just Regulate usage when out of town or when temp will say perfect without it needed. U.plug it everyone in awhile. Same knowledge goes for all water heaters. They will all burn out eventually ..just depends how u treat em.
747677
Hi Allison! I would guess anything left plugged in is a fire hazzard but we did not have any problems. However, you have to have a thermometer too as the heater can sometimes warm the water too much
2233396
I had the same problem. I first replaced the over protection switch and the hi limit switch. heater then came on and as you have it just ran hot even in air dry, so I replaced the thermostat and the heater still remain hot and brightly glowing. I talked to a repairman and he said to check the heater for a short to ground. It was shorted. Replaced the element that only had one of the ceramic element holders broke. This fixed my problem. I hope this helps.
2052907
Is this a new unit? If it is, you might consider warranty repair. If it's been in service for a while, I would look at the unit while hot water is running to see if you have plenty of flame coming from the burners. I've never had problems with the water being only warm on my unit, usually too hot.
1720681
If your problem is occurring even with the temperature low AND your tank is older, it is possible that the heating coils within the heater are deteriorating. This exposed "hot spots" that boil the water even if your temperature is low. Or...the thermostat is broken and on "high". This has finally happened to mine and I get noise and sputtering even at the lowest setting. Time for a new tank for me. Mine lasted 10 years.
1547502
I had this problem. Took off the cover & had an exposed wire that was shorting out. Ran new wire to the heater. Working fine.
2273539
I don't know...have you cleaned the filter? Have you drained the water out? Is anything blocked? By shutting down, do you mean it turns off completely? It's not supposed to do that, though you may have it on a setting to save electricity where it does that...You'd probably have to read the instruction manual...and if you don't have it, maybe it's available online..good luck!
524482
There's a plastic lever on the left side of where the wires hook up. Make sure the valve itself is seated properly., and slowly pull the lever down. You should hear the water rushing through the system and your heat will work until u figure if your thermostat is bad of the wiring is not right. Good luck
154645
You need to make sure you shut it off at the switch. It seems to cycle the heater briefly on an off until the switch is off.
1569859
The water temperature goes up on water flow when water is not moving it stops the heater from functioning.
501840
According to the manual there is a thermal overload protector built into the heater. This will prevent the heater from working again until you have done a reset on it. Reset: unplug heater for 10 minutes for it to cool down. After 10 minutes, plug the heater in again and turn it on. Another trouble shooting tip from the manual: check the thermostat setting and increase it until the unit comes on as it may be at temp. or you may need to clean the heater if it turns on and off. Vacuum intake grills with the brush attachment of the vacuum every two weeks and use a toothbrush to gently loosen any dirt that the vacuum didn't remove. According to the manual there is a thermal overload protector built into the heater. This will prevent the heater from working again until you have done a reset on it. Reset: unplug heater for 10 minutes for it to cool down. After 10 minutes, plug the heater in again and turn it on. Another trouble shooting tip from the manual: check the thermostat setting and increase it until the unit comes on as it may be at temp. or you may need to clean the heater if it turns on and off. Vacuum intake grills with the brush attachment of the vacuum every two weeks and use a toothbrush to gently loosen... » Read More According to the manual there is a thermal overload protector built into the heater. This will prevent the heater from working again until you have done a reset on it. Reset: unplug heater for 10 minutes for it to cool down. After 10 minutes, plug the heater in again and turn it on. Another trouble shooting tip from the manual: check the thermostat setting and increase it until the unit comes on as it may be at temp. or you may need to clean the heater if it turns on and off. Vacuum intake grills with the brush attachment of the vacuum every two weeks and use a toothbrush to gently loosen any dirt that the vacuum didn't remove. « Show Less
2080263
With the air temperature at about 11°F the water near the heater was at 42°F. I use an instrument called Kill-A-Watt to check the voltage at the outlet and the power drawn by an appliance. It seems your heater is not working or there is no power supplied to it.
1492923
Check the red over load button on the back of the heater. Check the power supply of the outlet plugged into. If that checks out ok, it is defective and you need to return it under warranty.
1788021
No, sorry. When we had an issue with our GE, it had stopped warming the water, it was a controller. Fortunately, GE covered it completely, replaced the part at no charge. You have to find a certified GE repairman.