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When is an engine so cold it cannot start?
Bad thermostat? Doesn't close enough to allow engine to warm up properly
What is wrong with a teledyne-Laars EG325 pool heater if the pilot light lights and the valve is on but the burner will not start up?
Here are a few things to check: Does the pilot light stay on after you light it? If so, good, did you turn the control valve to the "on" position? Sounds funny but there's a pilot position and a "on" position. Is the pump on? Water must be circulating through the heater to activate a pressure switch & then the burner will come on. If not find the manual on position for your pump timer to start the pump. Burner still doesn't come on? Check the burner assembly for plugged orifices (i.e. spiders, corrosion, etc.)and clean it out. The following is a more detailed and complete walk through, analysis :- Swimming Pool Heaters have a number of safety controls. Before the heater will turn on, all the safety switched must be "Closed", that is to say the electrical circuit is complete. But my heater doesn't have electric going to it you say ?? The Pilot light flame is directed towards a device that looks like an AA battery with 2 wires coming out the bottom. This is called a "Thermo-pile", ( from the French word "pile", meaning Battery.) This Thermo-pile creates electricity (DC, +/- 750 mV) which is the electricity that once it passes all the safety switches makes its way to the main gas valve and lifts the gas valve to Open and let the gas through to be ignited. Some of the safety switches are : Pressure switch. This is an important water pressure operated switch that tells the heater that there is water flowing through the heater. ( If your filter needs backwashing, and flow is poor -this switch will stay "Open" and not allow the heater to turn on. On/Off Switch... If I need to explain this - stop reading and call a Gas Appliance Professional. Thermostat : This is the rotary temperature Dial that senses the water temperature Fusible Link. : Often mounted on the front inside of the Cabinet, just above the Heater tray, this switch senses if flames are coming out the front of the cabinet. -If the fusible Link blows (a) it needs to be replaced and (b) FIND OUT WHY!! Flames and heat should go straight up, if they are coming laterally out the front of the heater then the heater is not venting properly and you need to know why. Common causes are (i) on a heater with a Flat Top, and no Stack (Chimney), a gust of wind or a downdraft caused by winds bouncing off an adjacent structure or wall can cause the flames to roll out the front momentarily. (ii) If the heater has been incorrectly installed with insufficient gas pressure, volume available to the Main valve, then incomplete combustion occurs, and the sooty smoke can clog the heat exchanger fins, which impedes the venting of the heater and the flames roll out the front. "Tired " Thermo-Pile. The Thermo-Piles lose their ability to produce current over time, and the Thermo-Pile may be generating enough power to keep the pilot lit, but not enough to open the main valve. There are other switches and safety's that vary on model and the installation, but the above information should solve 99% of problems. Remember, we are dealing with a very minute current here. If any of the wire terminals are loose or corroded, that will reduce the efficiency of the electrical circuit and cause sufficient loss of power that the Main Gas valve will not open. Good Luck MaDoGreg IF YOU HAVE TO LOOSEN OR OPEN ANY GAS CONNECTIONS, YOU MUST TEST THEM WITH SOAPY WATER AFTER RE-CONNECTION TO ENSURE THERE IS NO GAS LEAK. If in doubt, call a trained professional ! Greg M Simmons, C.P.O. East Hampton, NY 1-631-831-5017 gregs.cpo@gmail.com
Why is a low voltage thermostat normally more accurate than a high voltage thermostat?
A low voltage thermostat is typically more accurate than a high voltage thermostat due to its design and functionality. Low voltage systems often use more sensitive components that can detect smaller temperature changes, leading to finer control over heating and cooling. Additionally, low voltage systems generally allow for more sophisticated features like programmable settings and advanced sensors, enhancing their overall performance and accuracy. In contrast, high voltage thermostats may rely on simpler mechanisms that can result in greater temperature fluctuations.
Zone valve is used to open in hot water heat?
A zone valve is actuated by a thermostat and will allow water to pass from the boiler to radiant floor piping or base board radiators or in some cases a hot water storage tank.
Why would you not have hot water when heat is on in house?
"If" this is a boiler system "and" it has a boiler fed domestic hot water heat exchanger, the system most likely has a priority thermostat or relay that has failed. Most systems allow the domestic hot water heating to have "priority" via some type of control strategy. Or maybe they did not install one. Or maybe this does not answer your question at all. Not knowing all the parameters makes it tough. If this happens to be an AMTI HW model heatmaker boiler, the three wire thermostat on the DHW leaving pipe is defective. lc
Why would water not flow though the heater coil?
Heater core plugged? Heater core airbound? Thermostat not opening to allow coolant flow?
What affect will a bad thermostat have on an automobile heating system?
A stuck open thermostat will not allow the coolant to get up to proper temp, thus poor heat from heater. A stuck closed thermostat will not let coolant circulate and will cause the engine to overheat.
If there is power to the off switch for the heater is the switch gone?
If you are talking about a wall switch for the heater, check to see if the heater has its own internal thermostat or switch as this might be in the off position and not allow the heater to turn on. If you are talking about a switch on the heater itself, then yes in all probability the switch is not working.
Would a broken thermostat on my Audi a3 s reg 1.6 stop your heaters from blowing warm air at the moment they only blow cold?
Thermostat may not be opening to allow coolant to flow through heater box. Thermostat may be opening too soon allowing cold coolant to flow through heater box. Either way thermostat needs replacing
Why does your 1994 Chevy Caprice heater not work?
Heater Core and New Thermostat. Through time build up of residue in the heater core does not allow heat to get pumped through. Simple Fix by your self. Run you around 80 for both
What controls the flow of hot water to the heater core on a 1993 Pontiac Sunbird?
Thermostat has to open to allow fluid flow. The supply hose to the heater core is located before the thermostat, forcing the coolant through the core even as the coolant is heating up. Water pump has to work properly to cause fluid to flow. Temperature control (lever) has to operate properly to allow fluid flow. System must not be air-bound to allow fluid flow Heater core must not be plugged
How can a thermostat affect the heater?
if the thermostate is stuck open it wont allow the coolant to reach a certain temp. which could cause the heat to not work to well.
2003 Pontiac grand prix no heat the temp goes up and then all the way down and then you get heat?
A malfunctioning thermostat can cause your temperature gauge to go up and then allow the gauge to go all the way down. When the thermostat is stuck closed, your engine will overheat and water will not get to your heater core. When the thermostat opens the engine cools down and water flows to the heater core.
1994 camaro heats up and blows cold air?
Check coolant level Perhaps thermostat is not opening to allow coolant to circulate through engine and heater core
How do you set the aquarium heater without boiling them?
You will need to know the current water temperature in your tank by using a thermometer, so you know if you need to increase or decrease the water temperature for your fish. Take your heater, place it in the tank according to the instructions, DO NOT plug the heater in for at least 20 minutes. After plugging the heater in, slowly turn the thermostat up until the heater light comes on and turn it back until the light goes out, if the light is on when you plug the heater in, slowly turn the thermostat down until you find the point where the light goes out. You have now just adjusted your heater thermostat to the current water temperature, turn it up or down as needed, but only by a small bit and allow 24 hours for the water to heat up or cool down, before adjusting the heater again.
Would a bad thermostat cause a decrease in gas mileage?
A bad thermostat can cause a decrease in gas mileage. If the thermostat is stuck open, the engine will tend to run cold. Not only will this result in a perpetually low temperature gauge reading and poorly performing heater. It will also cause the ECU to richen the mixture, since the engine will appear to be warming up to the ECU. This will result in poor gas mileage. Replacing the thermostat will allow the engine to fully warm up, which will restore gas mileage as well as heater performance.
Honda CRV 2000 will run heat. After you turn the heater on the temp goes back down?
Given only the information provided; if the cooling system is full of coolant, lt sounds as if the thermostat is stuck in the closed position and is not opening to allow the coolant to flow into the radiator. When you run the heater in the passenger cabin, it is acting as a mini-radiator and removing the heat from the the coolant. Check/replace the thermostat.
