How do you reset an RV comfort ZC thermostat?

By Elaine Knight
Page last updated: 22/10/2021 | Next review date: 22/10/2023
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Elaine Knight
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In this article, we will answer the following question: How do you reset an RV comfort ZC thermostat? We will talk about the most common issues with an RV thermostat and how to fix them, We will also teach you how to install and/or replace an RV air conditioning thermostat. 

How do you reset an RV comfort ZC thermostat?

It is very easy to reset an RV comfort ZC thermostat, and depending on the issue, there are a few ways to reset it:

  • Press 00 on your RV comfort ZC thermostat;
  • Switch the thermostat in Off position, remove the fuse for five minutes then plug it in again;
  • If the above solutions don’t work, disconnect all power from the RV then connect 12V power to fuse. 

Common issues with the RV comfort ZC thermostat and the solutions

ProblemPossible CausesSolution
The heater blows cold airThe unit no longer hasLPG.The main valve LPG is closed.The LPG detector isoff.There is air in the pipesof LPG.Refill the tankof LPG.Turn on the valveLPG main. Reset the detectorLPG.
Turn on and off theheater several times,waiting from 30 to 45seconds between cycles orlight the burners in thestove and leave them onfor a fewminutes.
The heater does not workThere is a blown fusein the motorhome. Battery chargingThe auxiliary is low.There is dust on thewall thermostat.Replace the 15a fusein the fuse panel, or thefuse 2a fuse in thewall thermostat.
 Run the engine batteryfor 20 to 30 minutesto recharge the batteryassistant.
Open the cover of thethermostat.
The reset button does not workThere is a loss ofconnection protection toland.Start the generator andreset the outletGFI. If this does not resolve theThe problem, call the helpline. Do not use electrical outletsuntil the problem hasbeen solved.

How to connect an air conditioning thermostat in an RV

In common with most car accessories in an RV, the thermostat that controls the air conditioning (AC) is a normal family unit. The temperature controller built into the air conditioning unit itself is pre-installed by the manufacturer and does not require user wiring. 

Wiring an AC thermostat becomes necessary when using a remote thermostat to maintain a constant temperature. Installing this kit is a simple project that will make your RV more comfortable in hot weather.

Consult the literature provided with your RV’s thermostat and operator’s manual. Make sure the correct colour-coded RV wires are connected to the correct numbered thermostat terminals. 

Typically the terminals will have a screwdriver slot to secure the wires. Colour-coded connections will typically be made as indicated in the following steps.

  • Terminal 1 is normally grounded to the vehicle’s system neutral. Usually, it will be black or blue in colour. Use your voltage meter and the instruction literature that came with your motorhome and thermostat to verify this.
  • Terminal 2 is typically unused. Use the manual to verify this.
  • Terminal 3 is typically hot, from the vehicle’s 12-volt system. Usually, it will be red in colour. Use your voltage meter and the manual to verify this.
  • Terminal 4 is typically unused. Use the manual to verify this.
  • Terminal 5 is typically the feed wire to the vehicle’s air conditioning compressor. Usually, it will be yellow in colour. Use your voltage meter and manuals to verify this.
  • Terminal 6 is typically the power cord for the fan’s high-speed fan. Usually, it will be green in colour. Use your voltage meter and the manual to verify this
  • Terminal 7 is typically the power cord for the fan’s low-speed fan. Usually, it will be green in colour. Use your voltage meter and the manual to verify this.
  • Terminal 8 is typically the power cord to the vehicle’s oven or an electric heater. Usually, it will be white. Use your voltage meter and the manual to verify this.

How to replace the air conditioning unit in an RV

To replace the air conditioning unit in an RV you will need:

  1. Turn off the power to the RV. There can be switches on the shore power unit to do this, but disconnecting the negative cable from the vehicle’s battery also works.
  1. :oosen all the screws on the roof side of the unit – this should include screws for the control panel and the screws that secure the unit to the ceiling – and remove the control panel and faceplate from the unit. Disconnect the cables below the plate by loosening their nuts; first, disconnect the ground wire.
  1. Climbing to the roof of the vehicle – this should require a ladder – throw away any caulking material from the AC mount if it exists, remove its mounting nuts and bolts, and remove the unit from its mount. Have an assistant ready on the ground to receive the old unit from you and deliver the new one to you.
  1. Place the new air conditioning unit in the hole and secure it in place with the nuts and bolts, placing any mounting brackets and gasket in the hole first if they come with the unit. If the unit is the same size as the original, its mounting holes must be placed in the same place, which means that you will not have to drill new holes. Climb down from the roof.
  1. Connect the AC wires from inside the vehicle by twisting bare lead from each wire along with its related wire from the vehicle and installing the nut on the connected wires. The neutral wire must be white; the high voltage wire can be red or black and the ground wire can be black or bare. Connect the last neutral wire.
  1. Secure all fasteners that must be connected from inside the vehicle. This may again include the screws that help secure the position of the unit and the screws that hold the faceplate panel and/or the control.
  1. Restore vehicle power through the ground wire and/or shore power switch to start and test the air conditioning unit.

Tips and Warnings: The control panel cannot be screwed into place. If this is the case, the panel should pop or slide occasionally, or it may already be mounted in place.

Caulking the new air conditioner on the roof is debatable and not necessary if the unit comes with a gasket. While putty can help seal holes to save energy, it could cause problems with the unit’s flexibility with the ceiling.

How to replace an air conditioning filter

You don’t have to go to an auto repair shop or agency for this simple job. No tools are needed – all you need is a couple of minutes and a new filter.

  1. Locate the filter access door. It is under the instrument panel on the passenger side.
  2. Slide the access door lock toward the rear of the vehicle to unlock it.
  3. Remove the access door.
  4. Pull the filter down and out.
  5. Install the new filter. Make sure the black arrow on the bottom of the new filter is in line with the direction of the airflow, toward the centre of the car and away from the fan motor.
  6. Replace and lock the access door.

The bottom line

If you have not managed to reset your RV comfort ZC thermostat and you don’t know what the issue is, we suggest you call the hotline or an expert to help you identify the issue and fix it.

Please let us know if you ever had any issues with your RV comfort ZC thermostat and how you managed them.

FAQ on How do you reset an RV comfort ZC thermostat?

How do I troubleshoot my RV thermostat?

To troubleshoot your RV thermostat, follow the next steps:

  1. Check and replace the RV thermostat batteries;
  2. Air Blast the RV thermostat;
  3. Check the wires and the connection.

Is an RV thermostat the same as a house thermostat?

No, an RV thermostat is not the same as a house thermostat. An RV thermostat needs 12V power, while a house thermostat works with 24V. It is not recommendable to replace an Rv thermostat with one for a house. 

Can you replace a thermostat yourself?

You can replace a thermostat yourself and it should be a pretty straightforward job. We have to warn you, however, if you don’t have basic electrical knowledge, it is best to let a professional do this. 

References

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