Easy touch control system temperature set at 75 but heater does not change from manual setting

The Ranco ETC-112000-000 is a temperature controller commonly used for HVAC and refrigeration applications. To connect it to an indirect water heater, you can use it to control the temperature of the water in the indirect water heater's tank. Here's a general guide on how to do this:
Please note: This is a general guide, and it's essential to follow the specific wiring instructions provided in the Ranco ETC-112000-000 user manual and the installation instructions for your indirect water heater.
Materials and tools you'll need:

1. Ranco ETC-112000-000 temperature controller.
2. Indirect water heater.
3. Appropriate wiring and electrical supplies (cables, wire nuts, etc.).
4. Screwdrivers.
5. Wire strippers and crimping tools.
6. Electrical tape.
7. Safety equipment (gloves, goggles, etc.).

Steps to connect the Ranco ETC-112000-000 to an indirect water heater:

1. Read the Manuals: Before starting, thoroughly read the user manual of the Ranco ETC-112000-000 and the installation manual of your indirect water heater. This will ensure you understand the specific requirements and wiring diagrams for your equipment.
2. Turn Off Power: Ensure the power supply to the water heater and the Ranco controller is turned off at the breaker box to prevent electrical accidents.
3. Mount the Controller: Mount the Ranco ETC-112000-000 controller in a suitable location, typically on a nearby wall or control panel, within easy reach. Make sure it's securely fastened and level.
4. Wire Connections:
   • Connect the power supply wires (usually 120V or 240V AC) to the Ranco controller following the wiring diagram in the manual. Typically, you'll have two power wires: one for Line (L) and one for Neutral (N).
   • Connect the load wires from the Ranco controller to the electrical terminals on the indirect water heater that control the heating element(s). Refer to the water heater's manual for the correct terminals.
   • Make sure all wire connections are secure using appropriate connectors (wire nuts, crimps) and cover them with electrical tape to prevent any exposed wires.
5. Sensor Placement: Install the temperature sensor (usually included with the Ranco controller) into the water heater tank. Ensure the sensor is in contact with the water, as it will measure the water temperature.
6. Power On and Set Parameters: Restore power to the Ranco controller and the water heater. Configure the Ranco controller according to your desired temperature settings and control parameters. Refer to the Ranco manual for specific instructions on programming the controller.
7. Test and Monitor: Once everything is connected and set up, test the system to ensure it's functioning correctly. Monitor the water heater's temperature to make sure it maintains the desired level.
8. Final Check: Double-check all connections and ensure there are no loose wires or exposed connections. Secure the wiring neatly to prevent accidents or damage.

Do you have Manual Climate Control System or Dual Automatic Temperature Control System ?
The temperature control switch:

• is a potentiometer that outputs a variable voltage to the temperature blend door actuator to set the position of the temperature blend door.
• initiates closing of the heater control valve. When set to full COOL, a lever on the temperature blend door pivot shaft depresses the pintle of the heater control valve vacuum switch. The heater control valve vacuum switch then applies vacuum to the heater control valve, closing off engine coolant flow to the heater core.
• is serviced only with the climate control assembly.

You may have disturbed something when changing the actuator , the vacuum switch o vacuum hose .

Is it it 75 degrees in the room? Does the heater operate when set above 75? Does it try to heat when set to a lower temp? If the heater does what it should to heat, it is simply reverting to thermometer mode. This is normal.

Sounds like the air blend door is not opening to let heat in.

Engine coolant is provided to the heater system by two 16 mm (5/8 inch inside diameter) heater hoses. With the engine idling at normal running temperature, set the heater-A/C controls as follows. Temperature control to full Heat, Mode control to Floor, Blower control to the highest speed setting. Using a test thermometer, check the air temperature coming from the center floor outlets and compare this reading to the Temperature Reference table.

If the floor outlet air temperature is insufficient, check that the cooling system is operating to specifications. Both heater hoses should be HOT to the touch (the coolant return hose should be slightly cooler than the supply hose). If the coolant return hose is much cooler than the supply hose, locate and repair the engine coolant flow obstruction in heater system.

POSSIBLE LOCATIONS OR CAUSE OF OBSTRUCTED COOLANT FLOW

• Pinched or kinked heater hoses.
• Improper heater hose routing.
• Plugged heater hoses or supply and return ports at cooling system connections.
• Plugged heater core.
• Air locked heater core.
• Restrictor in backwards

If coolant flow is verified and the heater floor outlet temperature is insufficient, a mechanical problem may exist.

POSSIBLE LOCATION OR CAUSE OF INSUFFICIENT HEAT

• Obstructed cowl air intake.
• Obstructed heater system outlets.
• Blend-air door not functioning properly.

TEMPERATURE CONTROL
If heater floor outlet temperature cannot be adjusted with the heater-A/C control temperature control lever, one of the following could require service:

• Blend-air door binding.
• Faulty blend-air door motor.
• Improper engine coolant temperature.
• Faulty heater-A/C control.

I believe what your experiencing is the 75 degrees is the hold temp position...the display then reverts back to the actual room temperature...it doesn't mean the set temperature changed back to 65 degrees. Try to reprogram the thermostat schedules, and try not to use the hold function...just the temporary hold. (which is bumping the programmed temperature up or down until the next programmed period)

Great question! It sounds to me like the Skytech's swing temp setting may be out of whack.
Here is a quick link to the product page with a link to the owner's manual at the bottom if you need: Skytech 3301 Fireplace Remote.
Below is an excerpt on how to check and modify the swing temp settings for the Skytech 3301. (I apologize if the copy/paste formats poorly).
The Thermo Mode on the transmitter operates the appliance whenever the ROOM TEMPERATURE varies a
certain number of degrees from the SET TEMPERATURE. This variation is called the "SWING" or
TEMPERATURE DIFFERENTIAL. The normal operating cycle of an appliance may be 2-4 times per hour depending on how well the room or
home is insulated from the cold or drafts. A smaller "swing number" increases the number of cycles so the room temperature is more
constant. A larger "swing number" decreases the number of cycles, which saves energy, in most cases. The factory setting for the "swing
number" is 2. This represents a temperature variation of +/- 2
0
F (1
0
C) between SET temperature and ROOM temperature, which determines
when the fireplace will be activated. The "SWING" number values are:
1=+ 1
0
F (.5
0
C), 2= + 2
0
F (1
0
C) and 3 = + 3
0
F (1.6
0
C).
SETTING THE TEMPERATURE SWING (TEMPERATURE DIFFERENTIAL)
1. To change the temperature "SWING" setting (1-3), press the TIMER/TIME and DOWN buttons
simultaneously to display the current "SWING" setting in the SET TEMP frame. The letter "S" will
display in the ROOM TEMP frame on the LCD screen.
2. Press the UP or DOWN button to change the temperature differential or "SWING" (1-3). See above
for 1-3 "SWING" temperature valves.
3. To store the "swing number press the SET button or allow 15 seconds to lapse, and the new "swing
number' will be automatically programmed.

MANUAL CHECK OF " SWING" OR TEMPERATURE DIFFERENTIAL
The operation of the factory set "THERMO SWING" can be checked by adjusting the SET TEMP 2
0
F above or below the room temperature.
This will cause the system to turn ON or OFF. Normally the system will only respond to temperature changes every two minutes. Manually
changing the SET temperature will activate the system in less than 10 seconds. IF the "SWING" is changed, then a new room temperature
differential will respond. Factory setting of "SWING" temperature is 2
0
F.

Your power center outside has to be "trained" again so it and the remote recognize each other. I don't have the charts in front of me but check your manual or one online. It's fairly simple to do.
If that still doesn't work, the problem may be with either the remote or the power center. Good luck with it.

Press menu, scroll to settings. There should be a choice labeled "calibrate". You can change the temp reading here.

If the Easy Touch is reading the correct temperature, but the heater is not - you need to double check the temperature of the pool water with a standard pool thermometer.
Other things to consider:
1) The water is traveling too slowly through the heater. If the water is heating too quickly, then it will shut it off. If it takes a while for this to occur, then this would not be the issue.
2) Thermostat/thermistor is incorrectly reading the temperature of the water prematurely shutting the system down.
Make sure you really are checking the temperature of the water and matching this temperature up with one of the two readings that you are getting. Don't just take the word of the displays on either unit.

"Hunter" says it all. Throw it out and buy a honeywell, robertshaw, or a white-rodgers. Hunter stats are notorious in the business as being problematic.