Heat pump Continues to run

Ride4Him · 12-28-2018, 02:51 PM

Greetings and Happy New Year everyone. I have a 2004 Adventure 38G.

I have the Thermostat set to 70 degrees.
When I arrived at my coach last evening the Furnace Heat Pump was running and the temp inside the coach was 87degrees. Outside temp was 58.
I had to manually slide the Thermostat to the OFF position.
When the inside temp reached 69, I placed the slide to the ELECTRIC position and the Heat Pump / Furnace came on. The inside temp started to raise above 75 degrees and the Heat pump / furnace continued to run.
Has anyone else had this happen and what was the fix?

Thanks for and comments / ideas.

Brad

Teamfoxy · 12-29-2018, 02:03 PM

It sounds to me like an issue with the thermostat.

But I am confused by your term "Furnace Heat Pump". Usually a heat pump is an electric heating unit in the (roof) air conditioner. I would consider a Furnace to be propane fired, but it does have an electric blower.

You should be able to hear the thermostat click off when the air around it reaches temperature. (You should be able to hear it when you move the control past the current temperature as well) If you can hear it click off, but the furnace is still running (for a long time), then the issue is likely in the control board. (Note that the blower will still run for several minutes after the furnace stops firing as a safety precaution.)

Ride4Him · 12-31-2018, 08:54 AM

Thank you Teamfoxy.
I removed the Thermostat cover cleaned all the dust off the circuit board.
Believe it or not that fix the issue.
As for the Heat Pump Heater confession.
My coach does not have any roof mounted AC not heaters.

It is a gas coach. The Heat Pump is mounted in the back of the coach which is both the AC and Heat unit. Runs on both Propane and Electric.

Thank you again for responding.

Safe travels and HAPPY NEW YEAR.

Brad

BobC · 12-31-2018, 09:35 AM

Just to be clear, you don't have a single unit that runs off electricity and LPG, you actually have two units, one dual purpose unit commonly known as a "basement air" unit, which is actually a heat pump and a separate, traditional LPG heater.

The heat pump can run in either cooling or heating mode, pumping heat either in or out of the MH and runs solely on 120V AC electricity (shore power or generator).

The traditional LPG heater can either be run on its own or in concert with the heat pump depending on how you set the switch on the thermostat. The LPG heater runs on LPG and 12V DC electricity (battery/converter power).

When the heat pump (basement air unit) is in heat mode, the LPG heater will kick in until the room temp is within something like five degrees of the set temp. Then the heat pump takes over. This can be confusing to those new to the system.

Here's another thread that may be informative:

http://www.winnieowners.com/forums/f...at-265590.html

Ray,IN · 01-06-2019, 08:24 PM

Quote:

Originally Posted by BobC

Just to be clear, you don't have a single unit that runs off electricity and LPG, you actually have two units, one dual purpose unit commonly known as a "basement air" unit, which is actually a heat pump and a separate, traditional LPG heater.

The heat pump can run in either cooling or heating mode, pumping heat either in or out of the MH and runs solely on 120V AC electricity (shore power or generator).

The traditional LPG heater can either be run on its own or in concert with the heat pump depending on how you set the switch on the thermostat. The LPG heater runs on LPG and 12V DC electricity (battery/converter power).

When the heat pump (basement air unit) is in heat mode, the LPG heater will kick in until the room temp is within something like five degrees of the set temp. Then the heat pump takes over. This can be confusing to those new to the system.

Here's another thread that may be informative:

http://www.winnieowners.com/forums/f...at-265590.html

The LP furnace will run when interior temperature is 45° or below, heat pump also runs during this time/temp period.When interior temperature rises above 45° LP furnace turns off. Thermostat set temperature makes no difference, at least for my Coleman-mach unit. I have heard of that 4/5° delta, it is not true for my unit.

codgerbill · 01-07-2019, 06:19 AM

AS a new owner you might want to look at the filter for the basement Air unit. It should be located under the bed. Also note that when you purchase a replacement air filter you should buy the cheapest filter, as a more expensive one will restrict the air flow.

Ray,IN · 01-08-2019, 08:56 PM

Quote:

Originally Posted by codgerbill

AS a new owner you might want to look at the filter for the basement Air unit. It should be located under the bed. Also note that when you purchase a replacement air filter you should buy the cheapest filter, as a more expensive one will restrict the air flow.

Those cheap green mesh filters are the root cause of the evaporator/condenser units not working as designed. I've been using Filtrete brand filters for 5 years without and negative side-effect. I do change it monthly when we are in weather that require the Coleman-Mach unit to run every day. You'd be very surprised at how much dust and pollen it captures compared to the cheap filters. Yes I know what the owners manual says, and I know my personal experience the coach stays much cleaner, as does the air.

When I first began using the Filterete filters I had to change it every two weeks because it was coated with dust. I must use a good quality filter due to COPD and chronic acute asthma.

codgerbill · 01-09-2019, 07:28 AM

I had a new basement air/heat pump installed in Shipshiwana Indiana. Leon @National RV told me to use the cheapest filters as the more expensive ones will restrict the airflow and over time will decrease the life of the unit. Leon is a specialist when it comes to AC/Heat pumps and refrigeration (RV fridges). I buy the filterite filters in lots of three ($8+) and check the filters on a regular basis.

Ray,IN · 01-10-2019, 09:23 AM

Quote:

Originally Posted by Ride4Him

Greetings and Happy New Year everyone. I have a 2004 Adventure 38G.

I have the Thermostat set to 70 degrees.
When I arrived at my coach last evening the Furnace Heat Pump was running and the temp inside the coach was 87degrees. Outside temp was 58.
I had to manually slide the Thermostat to the OFF position.
When the inside temp reached 69, I placed the slide to the ELECTRIC position and the Heat Pump / Furnace came on. The inside temp started to raise above 75 degrees and the Heat pump / furnace continued to run.
Has anyone else had this happen and what was the fix?

Thanks for and comments / ideas.

Brad

I forgot to directly answer your question in my first reply. Remove the 'stat from the wall, with everything turned off. Closely inspect the wire connections for clean,solid connections, these wires carry low voltage and a small amount of corrosion can cause erratic behavior. Remember to do the same for the other ends of those 'stat wires.