2004 Camelot Intermittent HVAC operation

[Dr4Film]

See above.  This was a post for a multiple Topic post, a violation....

Your 5 Button CCC sounds like to needs to be rebooted to restore the communications with devices. Procedure below and in your 5 Button CCC Manual

16. SYSTEM RESET
a. Turn the ON/OFF switch to OFF position.
b. Simultaneously depress and hold the MODE and ZONE
push-buttons while turning the ON/OFF switch to ON.
FF should appear in the LCD display until the MODE
and ZONE push-buttons are released.

 

[Tom Cherry]

Moderator NOTE.  This is a SPLIT NEW TOPIC that is in violation of the rules on multiple topics...as in each TOPIC should be specific to ONE problem and not a Laundry List.  These topics are confusing and not searchable and do not benefit members.

2) (The front heater would come on and shut down after a few minutes. This started on the way north in April.)  While parked the front heater would only work when in the heat pump position. Heat pump did not come on.  Felt the heater needed service. Went to use the heat pump instead and that's when the furnace came on. The next day it worked fine using the furnace setting. I think the 5 button thermostat is bad.

 I did search the A/C section and did not see any thermostat sections that seemed to fit my situation. And the cruise section talked about Smart Wheel test, but could not find that test either.

@Fred L Please to do not combine unrelated topics.  One post per issue, after you have searched.

Thanks

 

 

[Tom Cherry]

Need a little more information.

Do you have an Aquahot system or do you have two furnaces.  You can check that by looking and reading.  If you have an Aquahot system....then you will have to do some reading to understand how it works.

The usual issue with intermittent...and odds are... you do NOT HAVE a Thermostat issue.  If so, then the options are limited as there are no REFURBISHED 5 Buttons out there. Members often, without understanding the troubleshooting and way the Dometic MPX system work....blame of make erronous comments....often times they order the very expensive Aftermarket Thermostat....only to find... IT DOES NOT WORK...therefore they then have to find the issue...which is usually a "bad connection" or rarely, a bad Dometic controller. We just went down this path....and now the member's system works great.

SO....tell us which "FRONT HEATER" are you talking about.  The HVAC vents for HP or the floor register or the DASH HVAC.  That Dash HVAC is NOT connected or integrated with the Roof Top HVAC system.

Then, once we know, we can help...

Thanks....

[Tom Cherry]

It is one that was merged or had to be moved as the original one was a laundry list of three things and folks were jumping around.  The site rules specifically do not allow this.  

Please read the title...

Thanks.

10 hours ago, Dr4Film said:

See above.  This was a post for a multiple Topic post, a violation....

Your 5 Button CCC sounds like to needs to be rebooted to restore the communications with devices. Procedure below and in your 5 Button CCC Manual

16. SYSTEM RESET
a. Turn the ON/OFF switch to OFF position.
b. Simultaneously depress and hold the MODE and ZONE
push-buttons while turning the ON/OFF switch to ON.
FF should appear in the LCD display until the MODE
and ZONE push-buttons are released.

 

There have been hundred, not an exaggeration, in the past 15 years or so.  90% or 95% of the time...there is a COMMUNICATIONS ISSUE...as in the data cables (they look like phone lines) are NOT making contact or have had moisture and corroded or vibrated loose.  This is quite common.

The first step.  Remove the two covers that hold the filter and the housing.  Need alcohol and Q-Tips or maybe a small brush. Clean the female and male RJ11 terminals.  REPEAT CLEANING.  Then plug in one of the danglers or the Cables from the TOP...to either of the data cables.  You CAN mark them before you unplug...but they are designed for an assembler to put together and NO polarized or such.

When you plug in the cables to the coupler.  PUSH IN TIGHT.  Then remove and repeat a few times.  This cleans the contacts. Do the same for the REAR as well. It will only have ONE cable and the other Dangler is not used.  You can swap...again it does not matter.

Pop or remove the Thermostat from the Wall.  Clean the rear female on the thermostat and the end of the data cable.  Plug and unplug a few times.

NOW follow Richard's advice.  RESET IT.  The Thermostat should read FF and then it will be reset.

You need to fix this or get it working.  

Please respond with the info requested...